You're absolutely correct that most people, even those who have been raised and indoctrinated into these fascist societies, are not able to commit mass murder without damaging their psyche. One of the reasons Nazi Germany made the move from the Holocaust by Bullets to the death camps was the men commiting these massacres would completely break down because of what they were doing. And these were all volunteer death squads, no one was forced to participate in these mass murders, and even the most dedicated Nazi true believers were falling apart.
I think it's one of the reasons isn'trael relies on indiscriminate bombing, it's a way to distance the murderers from the realities of their actions. Plus collapsed buildings are ready-made mass graves, no digging required
Naw, they aren't against invading Lebanon they just don't want to be the ones hurt or killed. This is just the equivalent of Nazis trying to avoid Stalingrad