He is almost always right. He just expresses it in a way that hurts people a lot, and thats something he needs to work on. The term toxic is over used but yeah, he was very rude, insensitive, and offensive sometimes.

That's pretty mild compared to what I'm afraid of. Of course that it's not good that he is that way, although I would argue that any kind of bugzilla of an open source project is a toxic environment in itself, but that's not "rape-slaves in the basement" level kind of stuff