I disagree with Cleese when he says that political correctness was ever a good idea, and I hope he just said that as a polite pander in order to ensure that people stay and listen to the entire video. After all, Cleese never could have starred in this wonderful scene if any type of political correctness was around in 1979.
Otherwise, though, Cleese is right on the money when he says that today’s political correctness kills humor and, indeed, kills any form of communication. He’s especially on point when he says that those who can’t control themselves compensate by trying to control others:
If the video doesn’t load, you can see it here.