When a soldier is sent to the front, he doesn’t protest; not only is he risking his life, but he is forced to kill, even if he doesn’t want to kill; his free will abdicates; if he remains at his post, he’s a virtuous man, if he runs away, he’s a deserter, a traitor. The man posted to a concentration camp, like the man assigned to an Einsatzkommando or a police battalion, most of the time doesn’t reason any differently: he knows that his free will has nothing to do with it, and that chance alone makes him a killer rather than a hero, or a dead man.
