I can understand though how a lot of people either didn't know the full extent of what was going on at the time - considering they didn't have the vast network of information access we do these days - and a lot of people didn't want to know either. That doesn't make it right but I'm guessing a lot of people turned a blind eye to some things because I bet asking questions got you a lot more than just a telling off, and everyone had families and friends to protect.
The "I was only following orders" defence holds water for some, but not all.
When you think of the highest echelons of Nazi Germany; Hitler, Himmler, Goring, Eichman, Goebbels, Donitz, etc.. These are men who held the highest positions - very intelligent and astute men who knew full well what was going on and had full collection of the facts.
But then, Hitler wasn't without a heart... It was he who asked Eichmann to come up with a more humane way of killing jews - hence the Gas Chambers... :sarcasm