I think this subculture you've noticed might actually be part of that "Red Scare."
I really don't like the "cultural socialism" phrase. There are too many connotations in it and it's probably too vague for everyone. The way I see it there are really three extremes you can take on any political issue: One is an authoritarian preservation (or restoration) of culture, another is the authoritarian deconstruction (or liberation) of culture, and one is the libertarian position (which is almost moderate by definition; the individual communities are left to figure out what they want.)
The socialists/communists/bolsheviks (and in a more moderate sense, progressives) or in other words "The Left" are near the "authoritarian deconstruction" extreme. Examples of these might be the American progressives trying to take control of children's sexuality away from parents or the people writing laws against the cast system in India.
The Fascists, monarchists, religious fundamentalists, and in a moderate sense conservatives, or in other words "The Right" are near the "authoritarian preservation" extreme. Examples of these include the Taliban, America First etc.
The libertarians/liberals/anarchists are what we already know. Something I don't think people appreciate about them though is that they allow for consensus in some situations where none is achievable. People often confuse them for the Right because of the US's tradition of liberty and because of the freedom of association thing. They confuse them for the left because of how destructive anarchy is.
None of these extremes are ideal. All degenerate into something horrible if you lean hard into any one. It's much easier to understand your own position on any topic along with someone else's because they become a vector of sorts made up of these.
I think you've grouped the two authoritarian extremes under "cultural socialists" and are confused because they're different phenomena (often reactions to each other.)