How could anyone be complicit in the slaughter of tens of thousands of people in a single day, not even just in a moral sense but even in a physical sense. How does the body not shut down when confronted with the horror of such a thing?
If someone was shot in the head as I watched, even if I knew there was zero danger of being shot myself, I know that my body would react with pure revulsion and I would find it hard to stand up, much less take part. It seems it would just be an evolved response, something intrinsic.
But these men just slaughtered thousands of people like pigs - how? Why?