Critical theory is a tool for the furthurance of the progressive meme. They are cavlinist fundamentalists, control freaks. In order to manage people into utopia, it is necessary to categorize people. Although there is a strong Marxist line into oppressor vs oppressed, the real categories have always been problems to be removed vs allies. Blacks, particularly the good ones as they say, shifted from problem to allies after succesfully forcing them into democrat submission.