Genuine question. Are you indicating the IDF are not supporters or don’t believe in what they are doing? Their actions are forced because of duty?

I guess if a massacre is a massacre then it would have a high chance of affecting those involved regardless of belief.

I think even if they agree at first, this can be traumatic anyway. If I remember correctly, I read about Vietnam veterans that killed civilians including children out of anger and then were horribly traumatized. So both things can be true.