Contrary to popular belief, human culture didn't begin on Twitter. The battle against "online hate" is just the current generational manifestation of a conflict that, yes, has its origins in the ideologies and cultural shocks of World War 2. Particularly where the meme-complexes of modern anti-Semitism and fear of "cultural Marxism" in academia, gender roles and homophobia are concerned, many of which were established either by the Nazis directly or the initial right-wing political shift in the US following the war. Today's redpillers, anti-wokists and the like are just rehashing beliefs that were old hat in their grandparents' time. Even the culture war over transgender identity isn't new - there was an episode of All in the Family about it in the 1970s.

I mean go look up any of George Carlin's old bits on political correctness and they would fit in perfectly in a modern day context, despite being made before the WWW was so much as a gleam in Tim Berners' Lee's eye. You'd just have to update the technological referents.