Nothing to do with post modernism, it's a version of Marxism that is compatible with capitalism. Post modernists can't be ideologues by definition. Intersectionality is very much an ideology. People who believe that don't ask question, they do finger pointing and public shaming to try to change and control public discourse. It's very reminiscent of the soviet union era, except it doesn't come from the state but a group of people that hold a certain power of influence, ironically.