Wasn’t the gas chambers planned because German soldiers kept going crazy executing people directly. Even if you’re trained and brainwashed shooting a child in the back of the head is gonna mess you up (especially more than once). Dehumanising the victims, putting them into work camps, moving them to a room where the overseer can flip a switch. It was all to make you see them as less than human and make it easier to not connect the act of killing them to taking a life. Of course there were a whole lot of absolutely f*cked up monsters but I feel really bad for all the nazis who got sucked into a brainwashed cult and by the time they realised what they were doing they had no out left.