I was looking at the wikipedia entry about George Orwell. he had interesting quote on pacifists during his time. In some way, It kinda applies to the far left. I might be wrong… it is just that some of the anti war people just come of that way.
“The majority of pacifists either belong to obscure religious sects or are simply humanitarians who object to taking life and prefer not to follow their thoughts beyond that point. But there is a minority of intellectual pacifists, whose real though unacknowledged motive appears to be hatred of western democracy and admiration for totalitarianism. Pacifist propaganda usually boils down to saying that one side is as bad as the other, but if one looks closely at the writing of the younger intellectual pacifists, one finds that they do not by any means express impartial disapproval but are directed almost entirely against Britain and the United States.” Notes on Nationalism, May 1945.