Wars are not instigated by people - they are instigated by politicians and businessmen (who tend not to risk their lives by fighting) - the people who fight them and are slaughtered don't get a vote as to who "their enemy" is (or any other choice in the matter).
It would be idealistic to think that things will ever be different, but I find it heartwarming to remember that, for a few hours, han beings recognised others as fellow-human beings and not an "enemy" somebody had invented for the rest of us to die for.
Jim Carroll