I see. I’m on a college campus in the United States right now, and I can confirm what he describes exists here exactly as he describes it. There may be a generational or geographical gap between our experiences.
OK, I'll take your word for it. But I have a hard time imagining what that experience could even look like. I mean, do people go around quizzing each other on their anti-racist credentials? In my world, this doesn't even come up in day-to-day conversation. The only reason it's on my radar screen at all is that I wrote a blog post about it a few months ago that ended up blowing up in my face.
I don't know about quizzing each other, but when my youngest sibling, an unemployed community college dropout, got super involved in the Portland antiracist scene, to the point that they stopped talking to our family (because we represent white oppression, basically what the author described) it has been really rough to see our love for them weaponized to push this particular cult. Having a family member join a cult doesn't make day-to-day problems (they don't even speak to us anymore), but that doesn't mean it's not a major social trend
If it sounds cartoonish, that’s because it is. The manifestation I’ve seen around me is that groups of 3–4 will pretend to befriend unsuspecting victims, inviting them to events and parties etc., then yell at/berate/abuse them at the first un-“woke” comment (no matter how innocuous), command that person to be better, and then completely cut contact. A person will think they have new friends, then a switch is flipped out of nowhere and those friends are gone.