Be they "left" or "right," those who agitate for racial polarization seem to have no sense of the harm they could do to everyone in our society. As the wise Glenn Loury would say, they are playing with fire. By polarization, of any kind, I mean more than merely a vigorous disagreement over issues or even basic principles. That's fine. Rather, I mean something dogmatic, obsessive, and fanatical, in which virtually everything in the world is seen through a single lens and everyone is expected to act and speak in a certain way, with stern consequences for the noncompliant. It can happen in...















