It is quite beyond my comprehension why anyone would, as most of the MSM do, refer to Brzezinski as a "realist." Those of us who were around back then recall his advice to Carter regarding the Iranian situation. It was nothing less than to invade Iran. Carter vetoed the idea in favor of a surrender which was, in the event, nearly as bad a policy. But Carter isn't helping Obama form his foreign policy and Brzezinski is.
As far as this recommendation for an outright, unilateral retreat, I can only marvel that anyone takes it seriously. "Yeah, that'll show 'em all right" is the attitude of a ham-fisted tyro, not a "realist." What it will show them is that inveterate, shameless, murderous violence works if applied long enough and that it is likely to work again if continued.
Until someone creates a glass covered parking lot out of an Islamic nation aiding these murderous bastards (like the vermin in India), the infestation of Islam will continue to murder and destroy civilization.