I think Sanders made Sullivan look like an idiot actually. As for Sanders, he had no one he could use to do the symbolic moral grandstanding. He had people like that one clown as the WashPo actively undermining the fact that he supported the CRM. Basically, when you clear out the field for a candidate like Hillary, the only credible challenge from the left happened to be a guy who was from the whitest state in America. That is on the Democratic Party.
@Czarface I think the article agrees with you that all politics are identity politics. What is is attacking is using racial identity politics as a means of eliminating class-based critiques. The two are not opposed. But HRC surrogates made it so.