Guys in Vietnam (I talk from experience about Nam) saw buddies wounded or killed. Many of us helped get them on choppers to get medical help. Most of us had to shoot enemy soldiers. Believe me that is not easy for some of us. I know it haunts me. It goes against human nature to kill other human beings. Oh, there are some people who like killing, no doubt. But I think most folks do not enjoy taking life from another human.