Alot of these American peace protesters probably take for granted the peace and safety of their own country. Despite our problems, its a lot nicer here than most places.
It's not really that...for these people pacifism is a religion. They follow Gandhi's precepts: that if you simply refuse to engage in war, no matter what, then peace must rule the day and you can find "other ways" to solve your differences.
They have narrow view of human nature and are practically psychotic in their belief that if you refuse to fight, war will end. That surrender and enslavement, and even death, is preferable to fighting for anything.