I am sorry, but I don't think anyone who ever KILLED even ONE person (willingly or not willingly) can be normal again. I am not saying he is insane, but he is definitely not the person he was prior to killing.
And for me, there is no excuse for killing. None. I can only understand that people are pushed to defend their selves and their families once someone else COMES to their "door" to actually kill them. Even then they can't stay "normal" all though it's easier for them to cope morally then for attacker (occupier)...
I know it is all much more complex and especially men have different approach to war...
We were in shock when during Bosnian war of 90s a family of relatives of my husband came to visit us in Belgrade. Young wife of that relative came fully dressed with full make up on her. And she was in Belgrade to shop for clothes. It was like there is no war there where they came from (Bosnia).People just use to the situation. Our friend's wife (from Serbia) was totally in panic when Milosevic took him to the Army and sent him on Vukovar ( Croatia). She couldn't sleep, or eat...and probably did not bother to even "wash her face in the morning" let alone put make up...
But I remember also they told us when a 3 years old girl that came with family from Bosnia saw city lights she said "Mum, look, lighting bullets" cause that was the only light she had seen. I don't know if this girl will be "normal" as she would be if she did not experience war in her early childhood...
War is terror...nothing to smile about...


Science without religion is lame, religion without science is blind...Albert Einstein