Part of what was so effective about the Vietnamese, and Chinese in the Korean War, was getting the prisoners of war to feel shame. Any shame was what they wante

Part of what was so effective about the Vietnamese, and Chinese in the Korean War, was getting the prisoners of war to feel shame. Any shame was what they wanted. Shame that they were captured. Shamed that they were attacking villages. Shame that they gave up secrets. So not only were you saying things that a romanticized view of the military has pounded into you that you would never do... but your captors are trained and specifically trying to make you feel shame / degrade your sense of self value. So I think it is more than just physical torture, but unfortunately adept mental torture as well, that leads to men having those emotions.