UPDATE: Humor can be a subtle thing. The video above was not intended to agree with Olbermann, it was intended to ridicule him. Compare the faces of the NBC family surrounding him with the faces from these tea party videos:
Anybody else, any other network I would give the benefit of the doubt to, figuring that they had just automatically presumed the tea party people were racist, and so didn't bother to go to a rally and look. But as I showed in an earlier post, MSNBC has in the past actually edited footage to conceal African Americans.
Second update: Tea Party organizers respond directly to Mr. Olbermann