You still find such blights in schools and colleges but most thinking people take PC and multiculturalism as bad jokes.While I agree with you about some of the propaganda is ignored the leftist programming has had a measurable effect on how young people think. I work with recent college grads and my own kids are recently out of college. While most kids easily shrug-off the revisionist nonsense programmed by the leftist's view of history many kids still cannot. I have met several young women who believe us white males are basically evil and are not to be trusted even though they know better -- this is how they've been programmed to look at us.
Also the code word "diverse" is also used by recent grads to mean, good or very good. So if the cafeteria, has a "diverse" menu, then that means the food is good. If we have a meeting and they say that the participants were a "diverse group" then it was a good meeting. This PC garbage does have an effect.