Thanks for covering this important topic. I found the historical context particularly helpful. My far-left Democratic friends tend to admit that the CPUSA made such mistakes before Kruschev, but refuse to beleive this is a continuing problem. While your list of links to prominent left-wingers is quite helpful, I would love to see a sequel post that provides memorable, concrete, recent examples. I think those would prove to be persuasive to a wider audience. It might also help if you showed that moderate Dems do not often make such mistakes.