From Tyler Cowen, of course:

Most importantly, there is a critical distinction between hypocritical discourse on race and racism itself. Hypocritical discourse on race is harmful and often Sailer does a very good job skewering it. But racism itself is far, far more harmful, whether in the course of previous history or still today. It is fine if a given individual, for reasons of division of labor, spends his or her time attacking hypocritical discourse about race rather than attacking racism itself. (For instance we shouldn't all focus on condemning Hitler and Stalin, simply because they were among the most evil men; there are other battles to fight.) But I still wish that specified individual to ardently believe that racism is the far greater problem.