Idealism is one way. Most everyone who hears JFK’s “ask not what your country can do for you, ask what you can do for your country” only hear the nonsensical idealism of the early 1960s. Service to the state as service to others. No one seems to hear that “what you can do for your country” quickly came to mean get drafted and fight in Vietnam. (Which was service to the state, right?)
Another, I think, is to provide bread to those who might otherwise oppose the mass murder. I agree wholeheartedly with this sentiment:
I’m not entirely sure what goes on with progressives/liberals, whether it’s really THAT easy to buy them off with social welfare or what, but they really don’t seem to care about the wars when they are waged by Democrats (and this was not true in the late 1960s; opposition to the Vietnam War by the left is probably what sunk Hubert Humphrey). They really don’t. I guess it’s okay for Americans to kill, maim, torture, bomb and invade so long as all of that state violence is done by progressives for good progressive reasons. So long as gays can do it too and a dollop of health care is provided.
Not, of course, to those bombed.