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I would have liked to remove the part about political correctness, BLM and anti-racism as it does nothing to contribute to the discussion and the question can be answered without a reference to any of those things. I will not, because to do so feels misleading.
In general, I appreciate how old the book is because its removed from all modern political discussion yet the advice applies the same. I also appreciate how it has fans on all sides of the political aisle (details: https://en.wikipedia.org/wiki/The_True_Believer).
I think this is bang-on, and it's evident in the flattening that every concept undergoes when it makes contact with the masses. But I don't know if the descriptor "mass movement" applies very cleanly to institutions like higher education. They certainly have different characteristics, in that institutions nominally have somewhat-centralized authority while mass movements are driven by the collective whims of the masses.
I've never read this book but it was published several decades ago and I agree with the premise. Unfortunately I forgot which book it was so this comment is partly an effort to see if anyone else knows which book this is so I can finally get around to reading it.