It seems to me as though the phenomenon of "wokeness" is not well characterised through out the piece and instead it is used in a "we all know what wokeness is" fashion that actually clashes with the way the concept is viewed within the circles he himself is criticising.
I think within sociology and political theory there's actually a lot of discussion around the concept of "wokeness". What does it mean, how does it affect progressive views of the world when it comes to diversity and inclusion. It's definitely not a monolith and I think treating it as such is disrespectful to other people and bad for the public discourse.
In the same vein there seems to be a tacit agreement that everything involving Marxism is wrong. There's comments like "in the recent years all the sociologist departments have turned Marxist" as if that by itself was a condemnation. Although personally there's a lot of ideas in Marxism I disagree with, Ive really come to appreciate the critical analysis that's done of the capitalist mode of production through the Marxist lens.
Inequality in our world is definitely tearing society apart, and these concerns can be examined very thoroughly through Marxism. It's a framework of analysis that can be used.
So, ultimately, although I agree with the notion of cliques (or priesthoods, as he calls them). I think a big part of the analysis comes from a very biased perspective that fails at trying to comprehend the other's perspective and that's precisely something the author points at those he is criticising.