Counter question: Which discrimination based on race is right?
Well, he doesn't really "argue" it, he just asserts it, and I can't say I'm convinced, but the book is a massive bestseller and these ideas are very influential.
How can introducing more disparities reduce the average of disparities?
But I don't think we're using the word "discrimination" in the same way as each other. What I mean is this: if (say) black people are underrepresented in academia, Kendi thinks that universities should discriminate in favor of black people to rectify this disparity. And the same logic should apply across all sectors of society - we should actively discriminate everywhere until all races are equally represented in all endeavours. As Kendi puts it, "the only remedy to past discrimination is present discrimination." It's a simple philosophy... one might even call it simplistic.
Coleman Hughes wrote a good review of the book. I agree fully with Hughes: https://www.city-journal.org/how-to-be-an-antiracist
I can't imagine such a scenario. Maybe you could give an example?