Since when are Liberals pacifists? Since the 50's.
The beat generation began by toying with the anti Nuke position. After the bay of pigs things really geared up in that direction. By the late 60's they where quite proud to be called pacifist. They carry this tradition on; if only nostalgically, today. They are not as loud about it since 9.11. But what the hey, there is no draft, and most are to old anyway. The lack of personal danger has made most of them ton a large degree indifferent. They just talk the talk, these days.