The issues around trans identities and non-binary identities — where they overlap and where they don’t — are too complex to get into in this post. The root dynamic of the clash here, though, seems to be between the fact that legislation like C-16 is specifically meant to protect a minority who often suffer at the hands of rigid categories that work for the majority, whereas Peterson’s general fight is with the radicalism in postmodernism which seeks to completely dismantle those categories. Peterson sees the latter at work in the former, which I think is a paranoid overstatement.