Internal Monologue has harped on this subject before, but Greenwald has encapsulated it so nicely I felt I had to reproduce this tidbit
Among the political and punditry establishment, there has emerged a consensus that there is only one way to show that one is a truly respectable, mainstream, Serious Thinker about the war. It is to do this:
(1) acknowledge (reluctantly) that the war is going very poorly and wrinkle one's foreheads to show grave concern over the problem;
(2) oppose escalation (but respectfully, acknowledging what a serious, thoughtful -- even resolute -- option it is);
(3) oppose withdrawal (categorically, dismissively, snidely, as though any person with a grain of responsibility would never think of such a thing, given how patently reckless it is).