Lots of people who choose a career in psychology or similar fields are just trying to sort themselves out. And regardless of whether he's one of these people or not, dealing with mentally sick for several decades probably didn't help either.
The same people who claim to believe in science absolutely hate science when it makes them look like assholes. Jordan Peterson can back up everything he says with facts. This asshole laughing just says "because".
There was a guy I know who had the guts to say online that he liked female employees, because they were more thorough and they were just better than men in taking care of details, remembering everything and so on. He got so much whacking from feminists who said something like "there are no psychological or intellectual differences between men and women, male and female brains are the same". He was bullied so much that he disappeared from that forum the same day. And all he said is just what his experiences were.