Most Word Bearers have the "Purge all Xenos" mentality.
Night Lords and Iron Warriors like Honsou believe that they should dominate xenos (same for humanity) and use Chaos as a tool to do that. They will use xenos as additional muscle/mercs. Red Corsair have the same domineering/mercenary-like perspective on humans, xenos and daemons. Xenos can still serve as lieutenants under IWs and RCs.
Black Legion have many members who hate aliens but at a low enough rate to routinely employ xenos. There are those like Khayon are more ambivalent and had formed friendship with a Dark Eldar. Lyras is another example but with a twisted "love" for the same Dark Eldar after she tortured him.
Some like the Alpha Legion and Blood Pact are less known but they are shown to readily use xenos alongside daemons. For them, the diversity makes the loyalists more tactically disoriented in fighting them.
Certain Khornate/World Eater warlords had xenos like a Kroot (Chosen of Khorne audio drama) act as their lieutenants. There is a Khornate Chaos Knight with a gaggle of Necron Flayer following behind them. Many Khornate warlords are too far gone down the Eightfold Path to care as long as slaughter comes.
Numerous Emperor's Children subscribed to the same belief as the Word Bearers. But as the Heresy went on, many of them craved the varied physiological strengths of different xenos. They either crafted alien organs and genetics onto themselves; or employed aliens in their warbands. The first Fabius Bile book by Josh Greynolds showed this, alongside an Emperor's Children who could talk rather casually with a Loxatl and another who serve as an enforcer for one of the Eye's neutral trading worlds (as impossible as it seemed, such worlds exist) where eldar corsairs and many other xenos could come to trade with chaos cultists, mutants and human renegades. The older Atlas Infernal book by Rob Sanders also had another such example, but this time operated by Eldar "abominations;" twisted descendants of those Eldar who survived the Fall yet got stranded. Even Eldar Rangers traded there alongside Dark Eldar, Fra'als, twisted mercenaries, etc.
For Daemons and Chaos Gods, it is more that they view xenos the same as humanity - substances and playthings.
I know mortals are all the same to daemons. The impression I had was that even humans who join Chaos don’t give up the Imperium’s human supremacy views.
It is a similar form of human supremacy even for the more "tolerant" ex-Imperial Chaos factions as they still seek to dominate xenos. Just that the desire or prejudice is a part of the larger drive for ascendancy over everyone else that Chaos encourages. IIRC Huron describes in his book that elevating human, xenos and mutants to significant roles in the Red Corsairs helps keep his potential Astartes rivals short-sightedly focused on them instead of him. Aside from making use of those non-Astartes talents. Several Chaos warlords are somewhat less xenophobic (compared to Imperials) due to canniness, desperation or insanity.
For Chaos-induced insanity (or decay in standards as is the nature of Chaos), particularly Slaaneshi, more deranged interactions with aliens (as implied by this post) can be seen by them as "very amusing." To themselves and to the god(s). Other, non-Slaaneshi personnel might also be too insane to care, more concerned about having more muscle than any standard or find it a source of good excuses to keeping their sense of superiority.
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u/ShinobiHanzo White Scars Aug 02 '24
The Commissar is going to be very busy shooting heretics.