But a person who is genuinely racist (we both agree Prof. Sellers didn't say or do anything to fit that description) is more likely to engage in behaviour that is cruel - for example, denying a person a job or an apartment because she is from a different race. This form of cruelty was extremely common in American history and strong social disapproval of such views was one thing that made it much less common today. One way we express strong social disapproval of something is refusing to employ people who explicitly endorse such views. Maybe that seems cruel, but on balance, (perhaps) society is better off if there are some moral boundaries, even when it is hard to define such boundaries unambiguously. It is not that difficult to have some degree of consensus on such matters, and we did have that before the authoritarian woke movement started in American universities and media.