It’s a consistent recurring theme in their propaganda, from the grotesque racial caricatures in Nazi publications like Der Sturmer to the modern day, where they represent their enemies with hideous soyjaks and portray transwomen as not just men, but unwashed, hairy neanderthals.
Let’s not pretend there hasn’t been plenty of reactionary sci-fi (Heinlein, Orwell, Rand, David Weber, John Ringo, Vox Day, John C. Wright to name a few).
I’d ask you to look into the World of Gor novels, but nobody deserves that.