Yes, indeed. I have read some of his massive, multi-volume compendium ... “The Black Book of the American Left,” or something like that. It’s amazing.
Another quick read which is not to be missed is Tom Wolfe's "Radical Chic and Mau-Mauing the Flak Catchers". It's a great pair of essays on the rise of politics viewed through a strictly racial lens, and how it is used to beat down opposition.