Yeah, I knew someone whose personal pronoun was "D". It was quite annoying, but this was while much of this was still new and people just sort of went with it. Was awkward, to say the least.

The law that Peterson's talking about he's claiming would make using the wrong pronoun a crime. Whether or not that's actually correct is not something I have the ability to judge. It's what he believes is happening, and that's why he opposes it.

To say the far left or far right are inherently authoritarian doesn't make any sense, agreed. Or that identity politics are limited to any particular group, ideology or way of thinking.

One thing that has distanced me from identifying with leftist politics in recent years is the increasingly authoritarian bent of some of those who claim to be left-leaning (but are often just following identity politics on social issues and are usually fairly right-wing in terms of economic issues) -- what I guess you could refer to the mainstream left. The people who watch Colbert, guffaw at every Trump joke and are quick to post how disgusted they are whenever anyone says anything that's a bit out of line with respectable society. The people who always vote for the Democrats, often as a vote against Republicans.

The alternative to that crowd seems to be the hyper-ideological left. They're happy to argue, but mostly just in the context of which branch of Communism you think will cause the workers of the world to unite. Most love tight rhetoric and violent revolution with no plans for who does the dishes afterward.

I don't really see a takeover from either the right or left authoritarians, but I do see more polarization. And it feels as if antiauthoritarianism is becoming a sort of social faux pas. If you're not willing to regulate speech or condemn the other side as subhuman scum, you're a traitor. Talking with the "enemy" or considering that they could have a point is heretical. This doesn't mean you have to identify with a particular set of beliefs, but at the very least, you can't say anything that might be construed as something "those guys" would believe. Maybe negative belief, what Nietzsche called slave morality, bound together not so much by what you believe is good as what you hate.