I think you mean to say it's an overgeneralization. But not all talk about people is ad hominem. The latter fallacy is about drawing an inference from an irrelevant premise. That's not what I did in the article.

Certainly I generalized, and there are exceptions to all generalizations, but that wouldn't make mine an unfair generalization. Alberta is a hotbed of populist, libertarian conservatism in Canada, and it has been for decades, as that link pointed out. Peterson has deep-seated conservative tendencies, as well as amateurish ones, as I showed in the article. Do you think that's a coincidence, that he happens to be conservative and to have grown up in Alberta?

Anyway, what I said about Alberta was just a side point. The main point was that conservatives have authoritarian personalities (however they're formed), and it's that authoritarianism that might explain his attitude towards his critics.