What Makes a Good Soldier? What Makes a Good Murderer?

I've seen a lot of war movies, but this is a great one:
http://thegoodsoldier.com

This is the story of real veterans of U.S. wars, including Michael McPhearson whom many of us know as a leader in Veterans for Peace. These are veterans who have come to an understanding that war is all about training and compelling human beings to become murderous animals, and that the damage is deep even for those least harmed by this project, namely the killers themselves.