Want to understand so-called "cultural Marxism"? Look no further than this video!
What's funny is that you can literally undermine the entire notion with the argument I made in this post. A "group" can not oppress, or be oppressed-- only can individuals. So for an individual to play the "I am oppressed" card, he would have to articulate the specific instance in which he was "oppressed", and further, his wrath could only be targeted at the specific person(s) who did the oppressing.
And I have a sneaking suspicion that once you turned the debate towards the discussion of absolute specifics and evidence, these so-called "oppressed" people would have a very, very difficult time making any sort of logical, coherent, persuasive case.