Someone should ask Chrissy Matthews what he now thinks of purges on the right after this little tantrum from Keith Olbermann:

A week-long anchoring stint on MSNBC by Donny Deutsch ended abruptly on Wednesday, and four people briefed on the decision said the cancellation stemmed from an unflattering mention of that channel's No. 1 anchor, Keith Olbermann, a day earlier.

Mr. Deutsch had labeled his hour on MSNBC "America the Angry," and Mr. Olbermann was shown briefly in a series of clips of media bloviators during a segment that pondered what role the media plays in fomenting the public's anger. The four people briefed on MSNBC's decision said Mr. Olbermann's anger about the segment prompted the cancellation of the weeklong "America the Angry" series...

Mr. Olbermann's detractors have repeatedly claimed in the past that he has refused to host his show on occasions when he was unhappy with management...

"The segment did not go unnoticed and we're dealing with it internally," said Jeremy Gaines, an MSNBC spokesman.

So, to sum up, Keith Olbermann went postal when another anchor on MSNBC basically said he was an angry man because he was included in a segment entitled "America the Angry."

Does the man have no sense of irony at all?