The preference cascade causes media insanity

Clarice:

Last week a line was crossed, and full blown insanity manifested itself in the formerly-mainstream media. 

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Tammy Bruce offers up a plausible theory to explain the media's insanity, insanity so widespread even the occasionally more temperate Juan Williams was shamefully swept up in it:

I knew the liberal establishment would have a meltdown swathed in violence and depravity as they realized they were being rejected, and that time has arrived.

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For some time now, professor Glenn Reynolds, known to many as Instapundit, has talked about "preference cascades" I think the insanity of the media is triggered by their sense that a preference cascade is building up in the US which will wash them and their political clients out to sea.