Is there something in the water at MSNBC that makes everybody there crazy? Morning Joe, which ought to be the premier political talk show on morning television — but won’t be until it expands its guest list beyond Mrs. Alan Greenspan, writers and editors at the New York Times and the newsweeklies, and sneering lefties like Donny Deutsch, whose claim to fame is… what, exactly? — recently witnessed this Chernobyl-style meltdown by Lawrence O’Donnell, which has to be seen to be believed:

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Sure, it’s tough being on the side of the incipient losers, staring into the electoral abyss of 2010 and knowing it’s going to take a miracle to save you. But even Joe Scarborough — who normally is quick to assure his liberal guests that he’s not really that kind of conservative — couldn’t take the vicious animosity, not to mention the spectacular rudeness to one of his guests. To paraphrase Oscar Wilde, if this is how MSNBC treats its conservative guests, it doesn’t deserve to have any.

Memo to MSNBC management: in the immortal words of Joseph Welch to Sen. Joseph McCarthy at the Army-McCarthy hearings:

You’ve done enough. Have you no sense of decency, sir, at long last? Have you left no sense of decency?

You can see the more civilized second half of the segment after the jump:

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What about you? Have you had enough yet?