[user104658]

Originally Posted by Dezzy

People who opposed the Nazi regime had a tendency of being killed and their families would most likely meet a similar fate. What could he (or anyone) have done?

It's that old cognitive dissonance rearing it's head again; people like to think that if they were in the same situation they would retain their morals, THEY would refuse, THEY would resist, THEY could never do something so terrible no matter what the consequences of standing up and saying "no".

It's a lie. They would keep their mouths shut, put on a uniform like everyone else, and kill whoever they were told to kill.

People can't or won't believe that and so we have monsters.