History Main / AbsoluteXenophobe

[[caption-width-right:262:Given [[CrapsackWorld the]] [[EverythingTryingToKillYou universe]] they live in, this is a [[TheExtremistWasRight completely reasonable]] stance to take on [[AliensAreBastards alien life]].]]

* ''Series/StarTrekTheNextGeneration'': The Paxans from the episode "[[Recap/StarTrekTheNextGenerationS4E14Clues Clues]]" are a species who have this trope as their [[PlanetOfHats hat]]. When their usual method of [[LaserGuidedAmnesia mind-wiping]] anyone who might stumble upon their planet fails to work on [[RidiculouslyHumanRobots Mr. Data]], it takes some extremely fast-talking negotiation from Captain Picard to dissuade then from skipping to the "kill everyone to ensure our privacy" option.

** Probably the most extreme example from the humans is the Last Human, [[Recap/DoctorWhoS27E2TheEndOfTheWorld Lady Cassandra]]. She removed bits of herself that she saw as being similar to aliens or altered (inbred) humans. In the end, she became just a single sheet of skin with a face. To current era humans, she would be [[RubberForeheadAlien much]], ''[[HumanAlien much]]'' more alien than many of the aliens. And just to add icing on the cake, it's stated off-hand she's UsefulNotes/{{transgender}}. While no one ever holds this against her, it smacks of {{Irony}} that someone who wasn't born the sex they are now is so utterly obsessed with body purity.

** [[spoiler: General Zod]] becomes this along as a WellIntentionedExtremist after losing his love interest, [[spoiler: Ursa]], from Krypton's war with the Shi'ar, and blaming her death on all alien races; in which he generally viewed any non-Kryptonians as "primitives".
---> '''General "Thunderbolt" Ross:''' "Primitives"? Is that what you think of us?\\

* ''Fanfic/IsseiTheGamingGear'' has the Purifiers, a group of humans who want to eliminate all supernatural beings - even fellow humans who have spiritual power or Sacred Gears.

* The Dyson Primes from Creator/PeterFHamilton's ''Literature/CommonwealthSaga'' are the definition of this. Primes exist as sentient, immobile "immotiles" and sub-sentient motile servants that can merge to create new immotiles. Immotiles control vast armies of motiles and battle each other for resources and out of instinctive paranoia, since their biological imperative for perpetual expansion means they'll ''always'' clash sooner or later (and prefer it being sooner). You can guess [[DeathWorld what happened]] when they started building nukes. Also, the moment one of them (Morning-Light-Mountain) discovers wormhole technology, it exterminates all others and starts building a vast fleet in order to kill off every single living thing in the universe other than itself, not capable of ''comprehending'' the notions of sharing and coexistence. In its own words: "There is only one Universe and it can only contain one life. Me." These guys had gone so far as to exterminate every plant and animal life form ''from their own homeworld'' other than themselves and their food crops.

* In the Franchise/CthulhuMythos, one has the [[http://en.wikipedia.org/wiki/Cthulhu_Mythos_celestial_bodies#Yekub Yekubians]], who slaughtered every other intelligent race in ''their galaxy'' before heading towards ours.

* In the ''Literature/DoctorWhoNewAdventures'' novel ''Legacy'', Atissa, the High Priestess of Aggedor, starts of as an isolationist and a bit of a fundementalist, but with ''fairly'' measured disaproval of Peladon's place in TheFederation. When she finds [[spoiler: the dead body of her mother]], she snaps completely, and accuses the Doctor of the crime. When the Doctor points out he has no motive, she says that his motive is that he's an alien and aliens are evil.

** The buggers appear to be this, though as there is no communication until the end, it can't be confirmed. [[spoiler: It turns out they're not this at all. Rather, they simply failed to recognize humans as intelligent life forms on their own. Given that the number of individuals in Formian society is very small, with Queens acting through hundreds or thousands of drones, they consider murder to be unthinkable. When they realized that each human they killed was an individual roughly on the level of a queen, [[TheAtoner they felt so guilty that they held no hostility towards humanity for wiping them out.]]]]

* In ''Minla's Flowers'' and ''Merlin's Gun'' by Creator/AlastairReynolds, the Huskers are a race of extremely hostile and powerful xenophobes that at some point in the past, emerged from Dyson spheres near the galactic core and went about [[OrbitalBombardment bombing any signs of intelligence into dust]]. Humanity has been stuck in a HopelessWar for thousands of years as their [[LostTechnology technological base slowly crumbled]]. However, [[spoiler: the Huskers are human]].

* ''Literature/RevelationSpace'' has the Inhibitors, a race of post-sentient machines who wipe out any species that attempt to leave their home systems - though [[spoiler: they do it to try and retain absolute control of the Milky Way, to shepherd the Milky Way's stars through the Andromeda collision in a few billion years]]. Their motives have already degraded after only a few hundred million years - the Inhibitors have become much more brutal.

* Pretty much '''''everyone''''' in the universe in ''Literature/RemembranceOfEarthsPast'' is this, with alien civilizations unanimously subscribing to The Dark Forest Theory which follows the law of the jungle to the absolute extreme: if you reveal the location of your civilization to the wider universe for any reason; [[DoUntoOthersBeforeTheyDoUntoUs than someone out there will perceive you as a threat that needs to be exterminated]]: regardless if you were benevolent or not. [[spoiler:The Dark Forest way of thinking seemed to have been around as far back as when the Universe first sprouted sentient life: back when the Universe existed in 10D, only for subsequent wars being waged between galactic civilizations to result in the upper seven dimensions to slowly collapse into nothingness, and that the 3D Universe that we currently exist in is on its' way to being destroyed halfway through the story.]]

* Weston from ''Literature/TheSpaceTrilogy'' has no problem shooting the second species he sees on Mars without bothering to ascertain its intelligence. Even when he's told the creature is sentient at the end of the [[Literature/OutOfTheSilentPlanet first book]], he has no regrets and maintains that the only thing of value is the Human species. It becomes clear he doesn't value individual human lives or even the human being as it now is, but just that some creature that has some origin in humanity continues to conquer and plunder.

* ''Franchise/StarWarsLegends'': The Yevetha from the ''Literature/BlackFleetCrisis'' trilogy. They consider all other life to be vermin and their ambassadors scrub themselves clean with painful showers after any contact with other races and eventually commit genocide against every world in their star cluster not controlled by them. This later comes back to bite them when the [[Literature/NewJediOrder Yuuzhan Vong]], warlike conquerors themselves, invade the Yevetha homeworld -- and the Yevetha refuse outside help. The Vong drive them almost to extinction.

** Subverted with the Peacekeepers. They are initially presumed to be this: however, though they are extremely xenophobic - particularly around new species - and opposed to hybrids on general principle, they aren't really true examples of this trope in that they are more interested in conquest than genocide. However, even their usual reputation for xenophobia is largely due to regulations that not all Peacekeepers pay attention to: quite a few frontier officers and captains have been seen flirting with alien females, and some aliens and hybrids (like Scorpius) have managed to attain high office in Peacekeeper command.

** This is what makes the Masque of the Frozen Stars so terrifying (aside from the fact they are {{Monster Clown}}s who kill people with weapons that are horrifying and lethal ''even for this setting''). While other Harlequin troupes will occasionally tolerate other races and even aid them in battle against the Great Enemy, the Frozen Stars combine a fervent belief that the Eldar do have a future in the galaxy and will eventually reclaim it with an equally fervent belief that all non-Eldar races - human, Ork and Tau - are disgusting vermin to be wiped out for the Laughing God's amusement. Their rules in 8th Edition reflect this by gearing their Masque Form, unique Strategem and Warlord Trait to close combat lethality.

** The Ur-Quan are divided into two factions: Kohr-Ah and Kzer-Za. The Kohr-Ah want to wipe out all other sentient life in the universe. The Kzer-Za will settle for enslaving or confining all other sentient life in the universe. Similar to the Ryall, it comes down to a species-wide FreudianExcuse - eons ago, they were all enslaved by a race of evil creatures with mind-control powers, and after finally casting off their shackles (in a thoroughly horrible way, at that - turns out, the evil aliens couldn't maintain control of a being in ''absolute agony''), they decided that they couldn't risk it happening again. So they went to war with all other sentient life. The intervening generations have ''not'' mitigated their trauma - GeneticMemory means that it effectively happened to all of them.
** That said, the Kzer-Za are perfectly willing to find a new homeworld for races who have lost theirs (e.g. Syreen). It's a matter of PragmaticVillainy for them - they can't afford to have a fleet of potential enemies flying around, and destroying an entire race is not an option for them. Their doctrine is also easier to accomplish than the Kohr-Ah's because if you know you're going to die anyway you'll pull a LastStand or TakingYouWithMe. Although the Shofixti [[HonorBeforeReason did the latter anyway]], so that doesn't always work. Also, unlike many examples on this page, both factions/subspecies make it clear that they do not ''hate'' other species and are [[AffablyEvil rather polite]] when dealing with them; they're just convinced that their actions are the best way to ensure what happened with the Dnyarri [[NeverBeHurtAgain never happens again.]]

* ''VideoGame/StarRuler'''s Galactic Armory [[GameMod mod]] adds the "[[Literature/RevelationSpace Inhibitor]]" AI type. Inhibitors will go to war as soon as possible with any race they detect (after trying to extort them for resources, that is), and rely on weapons that distort space-time. Galactic Armory also beefs up the [[RacialRemnant Remnants]] -- who are long dead, but still have very much active [[SapientShip AI-controlled ships]] -- rather than just sitting inside their long-dead systems, the Remnants will periodically send out ships to cull the lesser races - and they do a good job of it too since they start out [[HigherTechSpecies several orders of magnitude]] more advanced than the player(s) or computer-controlled empires.

* The Marcabians in the episode "Secret of Easter Island" of the animated series of ''ComicBook/BlakeAndMortimer'' are so racist that they consider all other species inferior, killing them before they develop FasterThanLightTravel technology and become a "menace to the Marcabian Empire". By the time they had reached Earth, they had already exterminated several sentient species.

* ''WesternAnimation/TheOwlHouse'': [[spoiler: [[Characters/TheOwlHouseEmperorBelos Emperor Belos]] utterly despises the very existence of the inhabitants of the Boiling Isles. It doesn't matter how zealously loyal they are to his cause; he sees them all as savage and barbaric monsters to be mercilessly slaughtered without any hesitation. In "[[Recap/TheOwlHouseS2E16HollowMind Hollow Mind]]", he justifies his attempted genocide by stating that he is trying to save humanity from evil, even though ''[[{{Hypocrite}} he]]'' wouldn't hesitate to kill humans for suggesting he's wrong about witches and demons, ''including his own brother''.]]

** Probably the most extreme example from the humans is the Last Human, [[Recap/DoctorWhoS27E2TheEndOfTheWorld Lady Cassandra]]. She removed bits of herself that she saw as being similar to aliens or altered (inbred) humans. In the end, she became just a single sheet of skin with a face. To current era humans, she would be [[RubberForeheadAlien much]], ''[[HumanAlien much]]'' more alien than many of the aliens. And just to add icing on the cake, it's stated off-hand she's transgender. While absolutely no one holds this against her, it smacks of {{Irony}} that someone who wasn't born the sex they are now is so utterly obsessed with body purity.

* In Creator/PoulAnderson's "Among Thieves", the Kolreshites are described as follows: "The Kolreshite mutation did not show on the surface. Physically they were a handsome people, running to white skin and orange hair. It was quite possible for spies to infiltrate them -- but to keep up the pretense, spies had to be ready to [[IfYoureSoEvilEatThisKitten take part in cannibalism and worse]]. The mutation was a psychic twist, probably originating in some obscure gene relating to the endocrine system. One might call it extreme xenophobia. It is normal for Homo Sapiens to be somewhat wary of outsiders until he has established their bona fides. It was normal for Homo Kolreshi to ''hate'' all outsiders, from first glimpse to final destruction." The story then goes on to describe how such Absolute Xenophobes could be tricked into being ''too trusting''...

** The Daleks would like nothing more than to exterminate all non-Dalek life, and even remake the universe itself to serve Dalek purposes alone. They were created by Davros as a means of ending a [[ForeverWar centuries-long]], hopelessly stalemated war between the Kaleds (his people) and the Thals. Davros programmed them to "survive" by any means necessary, having decided, based on the endless war, that the only way for any one species to survive is by completely subjugating all others. This [[TurnedAgainstTheirMasters went poorly for Davros]] because he neglected to consider the fact that [[HoistByHisOwnPetard he is not a Dalek]]. The Daleks are so insanely xenophobic that they hate each other and themselves almost as much as everyone else. They have been known to start civil wars over trivial differences, one commits suicide in the new series when it discovers that it has been tainted with foreign DNA, and a new faction can't stand its own existence because they were created by the Emperor using human cells, making them even nuttier than usual. When said faction manages to create "pure" Daleks again, the former immediately and ''willingly'' allow themselves to be exterminated by the latter. Even the Cult of Skaro, specifically intended by the Daleks to be individuals and consider new ideas, turned on their leader when he favoured becoming "less Dalek" in order to ensure the survival of their race. How does a Dalek say, "[[Recap/DoctorWhoS35E2TheWitchsFamiliar You are different from me]]"?

* In Creator/PoulAnderson}s "Among Thieves", the Kolreshites are described as follows: "The Kolreshite mutation did not show on the surface. Physically they were a handsome people, running to white skin and orange hair. It was quite possible for spies to infiltrate them -- but to keep up the pretense, spies had to be ready to [[IfYoureSoEvilEatThisKitten take part in cannibalism and worse]]. The mutation was a psychic twist, probably originating in some obscure gene relating to the endocrine system. One might call it extreme xenophobia. It is normal for Homo Sapiens to be somewhat wary of outsiders until he has established their bona fides. It was normal for Homo Kolreshi to ''hate'' all outsiders, from first glimpse to final destruction." The story then goes on to describe how such Absolute Xenophobes could be tricked into being ''too trusting''...

* ''Videogame/StarRuler'''s Galactic Armory [[GameMod mod]] adds the "[[Literature/RevelationSpace Inhibitor]]" AI type. Inhibitors will go to war as soon as possible with any race they detect (after trying to extort them for resources, that is), and rely on weapons that distort space-time. Galactic Armory also beefs up the [[RacialRemnant Remnants]] - who are long dead, but still have very much active [[SapientShip AI-controlled ships]] - rather than just sitting inside their long-dead systems, the Remnants will periodically send out ships to cull the lesser races - and they do a good job of it too since they start out [[HigherTechSpecies several orders of magnitude]] more advanced than the player(s) or computer-controlled empires.

* ''VideoGame/TheUrQuanMasters'':
** The titular Ur-Quan are divided into two factions: Kohr-Ah and Kzer-Za. The Kohr-Ah want to wipe out all other sentient life in the universe. The Kzer-Za will settle for enslaving or confining all other sentient life in the universe. Similar to the Ryall, it comes down to a species-wide FreudianExcuse - eons ago, they were all enslaved by a race of evil creatures with mind-control powers, and after finally casting off their shackles (in a thoroughly horrible way, at that - turns out, the evil aliens couldn't maintain control of a being in ''absolute agony''), they decided that they couldn't risk it happening again. So they went to war with all other sentient life. The intervening generations have ''not'' mitigated their trauma - GeneticMemory means that it effectively happened to all of them.
** That said, the Kzer-Za are perfectly willing to find a new homeworld for races who have lost theirs (e.g. Syreen). It's a matter of PragmaticVillainy for them - they can't afford to have a fleet of potential enemies flying around, and destroying an entire race is not an option for them. Their doctrine is also easier to accomplish than the Kohr-Ah's because if you know you're going to die anyway you'll pull a LastStand or TakingYouWithMe. Although the Shofixti [[HonorBeforeReason did the latter anyway]], so that doesn't always work. Also, unlike many examples on this page, both factions/subspecies make it clear that they do not ''hate'' other species and are [[AffablyEvil rather polite]] when dealing with them; they're just convinced that their actions are the best way to ensure what happened with the Dnyarri [[NeverBeHurtAgain never happens again.]]
** The Kohr-Ah are also believers in reincarnation, and think they are doing everyone else a favor by giving them a chance to be reborn...as Kohr-Ah.

** In ''ComicBook/{{Superman}}'', while the Kryptonians weren't xenophobic to the same genocidal extent as their distant cousins, the Daxamites, they did look down on other species, and they, too, banned space travel research. That ban on space travel is one reason why there are so few Kryptonians left -- when Krypton blew up, most of the people had no means of escaping the planet (there ''was'' a space ark they could've used, but it along with the rest of the city of Kandor was shrunken and stolen by Brainiac). The only survivors were either stuck in a prison dimension, trapped in an off-world miniaturized city, or Superman sent away in experimental, illegal spacecrafts. The other reason was that the Kryptonians were all affected by the Eradicator (a genetic engineering project, an AI, and a bunch of other things, it's complicated), the upshot of which was that even if they found a way off the planet, they'd just die (Jor-El had to use special genetic engineering techniques on Kal-El so that this wouldn't happen to him when Jor-El launched him to Earth).

* ''WesternAnimation/TheOwlHouse'': [[spoiler:Belos utterly despises the very existence of the inhabitants of the Boiling Isles. It doesn't matter how zealously loyal they are to his cause; he sees them all as savage and barbaric monsters to be mercilessly slaughtered without any hesitation. In "[[Recap/TheOwlHouseS2E16HollowMind Hollow Mind]]", he justifies his attempted genocide by stating that he is trying to save humanity from evil, even though ''[[{{Hypocrite}} he]]'' wouldn't hesitate to kill humans for suggesting he's wrong about witches and demons, ''including his own brother''.]]

** The cultural dogma of the [[ScaryDogmaticAliens Ob'enn]] calls for [[http://www.schlockmercenary.com/d/20050508.html "the eventual extermination of all non-Ob'enn"]]. They do, however, recognize the usefulness of trading with other species and "borrowing" their expertise, where appropriate, until such time that they can get to exterminating.

** The dark-matter Pa'anuri. They have one name for baryonic-matter entities (which would include us, Earth, our Sun, and all observable (to us) matter in the universe), which is "ANNOYING". Using [[WarpWhistle teraports]] (since they create gravitic tunnels in space; sort of like having a blind man drilling holes through your house and occasionally nailing you with it) angers them, and if a species develops to the point of being able to teraport, they [[ApocalypseHow blow up that species' sun at the earliest opportunity]]. After drawing an extremely costly war against the [[HigherTechSpecies Gatekeepers]], the Pa'anuri moved shop to the Andromeda galaxy, where they began routinely destroying any civilization that invented the ''radio''. The first baryonic space-farers from the Milky Way who went there found several radio shells... All of which are thirty years wide, and then scrambled by a supernova shell. By Earth standards, we would barely have invented the tank by the time our sun would have been blown up. And even ''then'' they tried to trick the Gatekeepers into blowing up the galaxy, and after that failed and they went to war with [[DeusEstMachina the Fleetmind]] they have taken to [[spoiler:taking potshots at the Milky Way with the biggest Long-Gun known to sentient life, shooting ''everything they can see'' to try and get the Fleetmind (and get rid of more pesky baryonic beings along the way, since a missed shot just means someone ''else'' died)]].

If this xenophobia is a result of cultural influences, it may be possible to knock some sense into them and make peace. If [[AlwaysChaoticEvil this kind of xenophobia is innate]], [[GuiltFreeExterminationWar it's probably them or us]]. Such aliens may [[ANaziByAnyOtherName bear a resemblance]] to (or, as in the case of the [[Series/DoctorWho Daleks]], be explicitly based on) or [[PuttingOnTheReich dress like]] UsefulNotes/{{Nazi|Germany}}s. Compare HardCodedHostility. Contrast IntriguedByHumanity, or TheXenophile. Compare and contrast the MasterRace, who may want to kill other races/species but would rather conquer them.

If this xenophobia is a result of cultural influences, it may be possible to knock some sense into them and make peace. If [[AlwaysChaoticEvil this kind of xenophobia is innate]], [[GuiltFreeExterminationWar it's probably them or us]]. Such aliens may [[ANaziByAnyOtherName bear a resemblance]] to (or, as in the case of the [[Series/DoctorWho Daleks]], be explicitly based on) ThoseWackyNazis. Compare HardCodedHostility. Contrast IntriguedByHumanity, or TheXenophile. Compare and contrast the MasterRace, who may want to kill other races/species but would rather conquer them.

* Unicron, the GodOfEvil of the Franchise/{{Transformers}}, has made it his final goal to [[OmnicidalManiac wipe out all creation and leave nothingness in his wake]] so he may be at peace in an endless void. Out of eternal hate, he finds other living things appalling- save for those that worship and follow him. Even then, he's just saving them for last.
* Gah Lak Tus, the ComicBook/UltimateMarvel Galactus, is a fleet of killer robots motivated by a thorough loathing of all organic life; they don't just try to kill everything fleshy, they do so in the most hideous and painful ways they can come up with. Oddly enough, this loathing is almost completely irrational. The moment [[spoiler:Professor Xavier]] tries to make contact with it, it spasms with revulsion and opens fire on Earth. In the end, [[spoiler:they defeat it by giving it a fit of horror at being mentally contacted by the ''entire human race'']]. Oh, and they also shoot it with [[spoiler:a [[ItMakesSenseInContext Big]] [[WaveMotionGun Bang]]]] for good measure.
* ''ComicBook/ImmortalHulk:'' One issue gives a glimpse into the mind ([[AlmightyIdiot such as it is]]) of the One Below All. Where its counterpart the One Above All is intrigued by the mystery of the multiverse, the One Below is frightened and disgusted, wanting to kill absolutely everything everywhere so it can be alone.

* The Daxamites of Franchise/TheDCU are a ridiculously xenophobic society. They ban space travel, indoctrinate their children with fears of aliens, and teach them that Daxam is their entire universe. Franchise/GreenLantern Sodam Yat was a rare exception. His own parents had to ''brainwash'' him to rein him in, which backfired immensely when he broke free of it. He even chastised his own people for not getting outside help when the Sinestro Corps invaded Daxam. The place is so bad that Yat seriously considered just leaving it to Mongul and his Sinestro Corps goons because of how thoroughly they deserved that fate.
* ''Franchise/{{Superman}}'':
** The Kryptonians were another example from Franchise/TheDCU. While they weren't xenophobic to the same genocidal extent as their distant cousins, the Daxamites, they did look down on other species, and they, too, banned space travel research. That ban on space travel is why there are so few Kryptonians left -- when Krypton blew up, most of the people had no means of escaping the planet (there ''was'' a space ark they could've used, but it along with the rest of the city of Kandor was shrunken and stolen by ComicBook/{{Brainiac}}). The only survivors were either stuck in a prison dimension, trapped in an off-world miniaturized city, or [[Franchise/{{Superman}} sent away in experimental, illegal spacecrafts]].
** It's actually worse. The Kryptonians were all affected by the Eradicator (which is a genetic engineering project, an AI, and a bunch of other things, it's complicated), the upshot of which was even if they found a way off the planet they'd just die (Jor-El had to use special genetic engineering techniques on Kal-El so that this wouldn't happen to him when Jor-El launched him to Earth).
** Sergeant Preus of the Superman storyline ''Godfall'' takes this to new heights, desiring to exterminate all of Metropolis for the unforgivable sin of not being ruled by Kryptonians.
* In ''ComicBook/{{Runaways}}'', while the Gibborim may have needed a pair of aliens to form the Pride, they later reveal that they ''despise'' aliens. They treat Earth as a holy temple to their "Father" (heavily implied to be {{God}}) and condemn Xavin (a Skrull) for "desecrating" it with their presence.
* The ''Magazine/DoctorWhoMagazine'' comics series had Danny Fisher, an apparently heroic human space-secret-agent who was actually a sadistic, psychopathic speciesist who plotted to steal the Doctor's TARDIS and use it to spread a virus that would have killed every non-Terran lifeform in the universe, throughout history.

---> '''General "Thunderbolt" Ross''': "Primitives"? Is that what you think of us?\\
'''[[spoiler: General Zod]]''': Your country holds itself up as the example for the rest of your species when it cannot even govern itself; it covets what does not belong to it, and chases shadows of threats with utterly reckless paranoia. I do not ''think'' you are primitive, Ross; I ''know'' it.

* In Creator/{{Poul Anderson}}'s "Among Thieves", the Kolreshites are described as follows: "The Kolreshite mutation did not show on the surface. Physically they were a handsome people, running to white skin and orange hair. It was quite possible for spies to infiltrate them - but to keep up the pretense, spies had to be ready to [[IfYoureSoEvilEatThisKitten take part in cannibalism and worse]]. The mutation was a psychic twist, probably originating in some obscure gene relating to the endocrine system. One might call it extreme xenophobia. It is normal for Homo Sapiens to be somewhat wary of outsiders until he has established their bona fides. It was normal for Homo Kolreshi to HATE all outsiders, from first glimpse to final destruction". The story then goes on to describe how such Absolute Xenophobes could be tricked into being TOO TRUSTING...

* The [[EldritchAbomination Thirdspace Aliens]] in the ''Series/BabylonFive'' movie ''Thirdspace'' hate all other life forms in the Multiverse and according to the Vorlons they already killed thousands of species in their home universe. And now want to enter here...

* The Traash species in ''WesternAnimation/AdventuresOfTheGalaxyRangers'', BigCreepyCrawlies with the usual tropes that apply, were so xenophobic that "in Traash space, there exists no other lifeform but the Traash." When the Rangers' telepath was able to communicate with them, it was discovered that they hadn't even considered the idea that another species would try to make peace instead of attacking.
* In Season 1 of ''WesternAnimation/Ben10AlienForce'', the Highbreed were this. Obsessed with genetic purity, they inbred themselves to the point of sterility, dooming themselves to extinction within a generation. They were the first sentient species to develop in the Universe (or so they claimed), and they were disgusted with the prospect of younger (and thus "inferior") species living on without them, so they planned to exterminate all lifeforms in the Universe.
* The Marcabians in the episode "Secret of Easter Island" of the animated series of ''ComicBook/BlakeAndMortimer'' are so racists that they consider all other species inferior and they kill them before they develop FasterThanLight technology and become a "menace to the Marcabian Empire". For the moment they reach Earth, they already exterminate several sentient species.
* In ''WesternAnimation/EscapeFromPlanetEarth'' [[spoiler:Shanker's]] EvilPlan is to destroy every inhabited planet in the universe!
* The Brain Spawn in ''WesternAnimation/{{Futurama}}'' wish to wipe out all conscious thought from the universe because "the thoughts of others screech at them like the forced laughs of a thousand art-house patrons." Later, their plan is to collect all knowledge in the universe and then destroy it to keep any new knowledge from appearing.
* {{Fanon}} of ''WesternAnimation/InvaderZim'' often depict the Irkens as this, based on the canonical facts that they wish to [[GalacticConqueror take over the galaxy]] and enslave and/or destroy all other species. In-series, however, only Zim himself seems to have this direct hatred of other species - the other Irkens seem to be merely acting out of a desire for power and a sense of superiority.
* ''WesternAnimation/TheOwlHouse'': [[spoiler:[[Characters/TheOwlHouseEmperorBelos Belos]] utterly despises the very existence of the inhabitants of the Boiling Isles. It doesn't matter how zealously loyal they are to his cause, he sees them all as savage and barbaric monsters to be mercilessly slaughtered without any hesitation. In "[[Recap/TheOwlHouseS2E16HollowMind Hollow Mind]]", he justifies his attempted genocide by stating that he is trying to save humanity from evil, even though ''[[{{Hypocrite}} he]]'' wouldn't hesitate to kill humans for suggesting he's wrong about witches and demons, '''including his own brother'''.]]

** [[TheEmpire The Imperium of Man]] has Absolute Xenophobia as a matter of official policy, and the Imperial Cult preaches the supremacy of mankind and its UsefulNotes/ManifestDestiny to conquer the galaxy. That said, some useful alien races like the Jokearo are tolerated as "protectorates," TabletopGame/{{Rogue Trader}}s are allowed to interact with (and exploit) aliens as long as it furthers the overall cause of the Imperium, the Ordo Xenos of [[StateSec the Inquisition]] studies aliens and sometimes works with them, and the Imperial government engages in diplomatic relations with some of the [[SpaceElves Eldar]] [[GenerationShips craftworlds]] and [[TheFederation the Tau Empire]]. The Imperium would ''like'' to stamp out all the rival species in the galaxy, but it's barely strong enough to hold itself together, and in the case of the Tau, sometimes it's good to have some buffer states between you and threats like the [[HordeOfAlienLocusts Tyranids]]. The Literature/CiaphasCain novels examine this in more detail. The Imperium and the Tau do not like each other, but are not continuously at war, and Cain actually works with the aliens when their interests align, but he's also horrified at how far Tau sympathizers, including some of his fellow humans, are willing to assimilate into this alien culture. It's not just that they're eroding their sense of self, Cain's concerned that such open-mindedness [[GreaterScopeVillain could let Chaos could get its hooks in]]. ''40k'' is a setting where Absolute Xenophobia [[TheExtremistWasRight can be justified]].
** The other races aren't much better. Many Eldar, especially those from Biel-Tan craftworld, would happily rebuild their ancient empire by wiping out all the "lesser races" infesting the galaxy. The [[TheFairFolk Dark Eldar]] consider all other beings livestock to be tortured for their sick amusement. The [[SkeleBot Necrons]] are {{Omnicidal Maniac}}s that want to purge the galaxy of ''all'' life, not just sentient creatures, [[{{Retcon}} though now it would be more accurate to say only some of the leaders want that, while the rest want to reconquer their old empire through galactic conquest]]. [[OurOrcsAreDifferent The Orks]] will happily wage war on anything that isn't Orky enough, [[EnemyCivilWar which can include other Orks]], and if you're orky enough they'll just fight you even harder because they [[BloodKnight love it]]. Really, the Tau stand out for actively incorporating alien races into their empire, and even though it's usually a choice of JoinOrDie, the Tau are considered much more egalitarian than the others.

** Quite ironically, the ''least'' xenophobic faction in ''40K'' is actually probably [[ChaosIsEvil the various forces of Chaos]], the BigBad of the entire setting. Though most known for (and represented in-game by) the Traitor Marines, [[EqualOpportunityEvil Chaos will corrupt and use anything]]: renegade Imperial Guard regiments, abhuman and mutant underclasses, heretek techpriests looking for some way to escape the orthodoxy of the Mechanicus, freedom fighters and revolutionaries who don't truly grasp the price of their new dark allies, or even entire xenos races fallen and corrupted by Chaos.

* ''VideoGame/{{Seedship}}'': If you colonize a inhabited planet with a significantly damaged cultural database, your colonists will be this, and will attempt to genocide the natives. If the colonists are less technologically advanced than the natives, the natives will end up successfully doing the same to them.

--->'''Dalek''': EXTERMINATE!

* In ''Series/StarTrekVoyager'', the StarfishAliens Species 8472 are initially portrayed in their introductory episode "[[Recap/StarTrekVoyagerS3E25S4E1Scorpion Scorpion]]" as the most genocidal species that Starfleet has ever encountered. After the hostile [[HiveMind Borg]] invade their home dimension, the genetically superior aliens embark on a crusade across the Milky Way to annihilate all other lifeforms, not just Borg, because they believe that their mere existence might be a threat to their purity. They mercilessly destroy billions of Borg before their invasion is halted by a [[EnemyMine temporary Borg-Voyager alliance]]. Several seasons later, in "[[Recap/StarTrekVoyagerS5E4InTheFlesh In the Flesh]]", this is subverted when they are {{retcon}}ned into having only acted out of self-defense, and they're actually open to diplomacy.

* In ''Series/StarTrekVoyager'', the StarfishAliens Species 8472 are initially portrayed as the most genocidal species that Starfleet has ever encountered. After the hostile [[HiveMind Borg]] invade their home dimension, the genetically superior aliens embark on a crusade across the Milky Way to annihilate all other lifeforms, not just Borg, because they believe that their mere existence might be a threat to their purity. They mercilessly destroy billions of Borg before their invasion is halted by a [[EnemyMine temporary Borg-Voyager alliance]]. Several seasons later, this is subverted when they are {{retcon}}ned into having only acted out of self-defense, and they're actually open to diplomacy.

* ''Series/StarTrekTheNextGeneration'': The Paxans, the VillainOfTheWeek of the episode "Clues", are a species who have this trope as their [[PlanetOfHats hat]]. When their usual method of mind wiping anyone who might stumble upon their planet fails to work on [[RidiculouslyHumanRobots Mr. Data]], it takes some extremely fast-talking negotiation from Captain Picard to dissuade then from skipping to the "kill everyone to ensure our privacy" option.
* In ''Series/StarTrekVoyager'', the StarfishAliens Species 8472 are initially portrayed as the most genocidal species that Star Fleet has ever encountered. After the hostile [[HiveMind Borg]] invade their home dimension, the genetically superior aliens embark on a crusade across the Milky Way to annihilate all other lifeforms, not just Borg, because they believe that their mere existence might be a threat to their purity. They mercilessly destroy billions of Borg before their invasion is halted by a [[EnemyMine temporary Borg-Voyager alliance]]. Several seasons later this is subverted when they are retconned into having only acted out of self-defense, and they're actually open to diplomacy.

* The Pitar in Creator/AlanDeanFoster's ''Literature/HumanxCommonwealth'' novels appeared nearly human, and held out a cautious hand of friendship at first... but this concealed a species-wide psychosis that drove them to attempt to wipe out humans, thranx, and anyone else they could find.
* The Pak from Larry Niven's ''Literature/KnownSpace'' series. The Pak are driven by instinct to destroy ANYTHING that poses a threat to the survival of their bloodline. If it is not their species[[note]]or if one of ''their own race'' has mutated too much[[/note]], it MUST die. Did I mention that the Protectors of their species are super strong, super intelligent, and have super senses?
* John Ringo's Posleen from the ''Literature/LegacyOfTheAldenata'' series are this way, although they are so primitive that it's more that they are locusts destroying everything in their path than actually hate-filled monsters. The end results are essentially identical, however. They are, however, clearly inspired by David Weber's Achuultani, since both are Absolute Xenophobic sentient crested centauroids who rely almost entirely on their computers and attack in overwhelmingly massive swarms. Also, members of both races prove to be willing to listen to reason and, upon setting up their new, less omnicidal society, adopt new names and become allies of Humanity.

** It's actually worse. The Kryptonians were all affected by the Eradicator (which is a genetic engineering project, an AI, and a bunch of other things, it's complicated), the upshot of which was even if they found a way off the planet they'd just die.

* ''Series/StarTrekTheNextGeneration'':
** The Paxans, the VillainOfTheWeek of the episode "Clues", are a species who have this trope as their [[PlanetOfHats hat]]. When their usual method of mind wiping anyone who might stumble upon their planet fails to work on [[RidiculouslyHumanRobots Mr. Data]], it takes some extremely fast-talking negotiation from Captain Picard to dissuade then from skipping to the "kill everyone to ensure our privacy" option.

''On the way back they sang a number of tuneful and reflective songs on the subjects of peace, justice, morality, culture, sport, family life and [[BreadEggsMilkSquick the obliteration of all other life forms]].''\\
** The reason for this is that the story is [[RecycledScript recycled]] from an old ''Series/DoctorWho'' script Douglas Adams wrote. The Krikkiters were {{Captain Ersatz}}es of the Daleks.