I don't think the book is actually arguing for a Marxist revolution. I linked to the intro to the book, and there's zero mention of Marxism, even though Marxists love their Marx. They don't hide it. They are out and proud.
Read the intro I linked to. Ninety-nine percent of books, you can get the gist form the intro and skip the rest of the book.
To some extent, he just seems to argue that if you aren't pulling on the oars fighting racism, you're dragging in the water. No middle ground. Not sure I accept that, but it's not Marxism.