So it was aimed at replacing the existing structure...
> The "cultural Marxism" conspiracy theory posits that there is a group of people who want to destroy Western society.
How is this a conspiracy theory? There are people on the fringe left (and fringe right) who want to do exactly that. They wouldn't necessarily phrase it that way, but what they advocate for would accomplish that as a side effect. If the conspiracy theory is that these people are everywhere, then sure, but that such people exist is in no way a conspiracy theory.
> It relies on the idea that at some point Marxists changed to thinking in terms of gender or race rather than class - this is also false and lacking in evidence as GP also noted.
That is precisely what intersectional feminism is about.
https://en.wikipedia.org/wiki/Intersectionality#Marxist-femi...