Imagine this mental catch-22. You're 18, just graduated from HS, enter them military, and 9 months later you're killing people in Vietnam. Some orders come down that orders your platoon to slaughter an entire village. You come upon some very young kids huddled somewhere in the village, and your commanding officer orders you to "kill them" and you follow orders and murder several little kids.
Man, that has to haunt guys for the rest of their lives.
I talked to a lot of people at the time this was going on who had been in dire battle conditions. One medic told me there were sympathetic Drs that gave them drug cocktails to make it easier to deal with the death, dead and mangled bodies. No telling what the mental state of guys like in the massacre. The armed services didn't preach forgiveness . They taught death and destruction. I talked to Navy Seals in special training that were parachuted in parts of a camp at Coronado. They were hunted down, captured and dehumanized of respect for life. They were told terrible lies about their families etc. Trained to despise life and then turned loose to fight and kill. Mai Lai was a massacre created by DC.