Yes, that’s why it’s an “offshoot”. The founding thinkers of post-modernism were former Marxists and left-wing radicals (in the proper, actual political sense), again this is not a slur, simply a statement of fact. Depending on your political persuasion it may not even be a bad thing! But it is, at least, a thing. In as much as Mormonism is an offshoot of Judaism.

To revisit the original point, civil rights is deeply intertwined with radical left-wing and Marxist politics, for better or worse. Personally I think it’s a shame because civil rights should be for everyone, it is bigger than any political persuasion.

The best thing we can do is de-politicise these movements, the entire political spectrum has become so toxic and divisive.