What is rational for capitalists is irrational for workers, in general. However, I see below that I misunderstood some of the earlier quotes of Darrity, Myers, Williams and Botwinick. I don't quite get the Gary Becker proposition.
Racism raises profits .
In Gary Becker's original work on econ of discrimination capitalists had to pay for their 'taste' for discrimination in the form of lower profits. But white workers as a group are seen to suffer, even in the short term. This is the position that has been taken on by Darity, Myers, Williams, Botwinick, etc., in work that I think is well-worth studying for anyone interested in Marxist economics, race, class and gender, etc., and also real life organizing. This is a link with democracy, which has as a first principle Popular Sovereignty or The People as a Whole, now the People of the whole world as a Whole - All Power to all the People as a Whole. From a philosophical standpoint , we must start with the whole, and then to the parts, majority, minority, individual.