"I think "US out now" as a simple mantra neglects to consider the full range of possible disasters that could ensue. For one thing, there would be an Iraq civil war. Iraq wasn't having a civil war in 2002. And although you could argue that what is going on now is a subterranean, unconventional civil war, it is not characterized by set piece battles and hundreds of people killed in a single battle, as was true in Lebanon in 1975-76, e.g. People often allege that the US military isn't doing any good in Iraq and there is already a civil war. These people have never actually seen a civil war and do not appreciate the lid the US military is keeping on what could be a volcano."