And plenty of good German "Aryans" (the "typically German" race that Hitler was trying to promote) were killed as well for speaking out against the Third Reich, for hiding or associating with Jews etc.
It's difficult to say what any of us would have done if we were Aryans in Germany back then. At first, many of them would not have known what was going on, because the TR started out by weeding out the criminals, poor Jews etc. Bit by bit the circle widened to include more and more categories of "undesirables". It would have taken a while for people to realize that there was a systematic plan being carried out. Also, there were many rumours about where people were being taken, and there was at least one "show" camp i.e. a camp that the U.N. etc. could be shown as the "model" camp so they thought the Jews were all going to work camps/villages instead of death camps.
It's very difficult to speak out about the Gov't when there are spies everywhere, you don't know if someone will report you, and you know that if you do get reported the SS will come for you in the middle of the night and either shoot you on the spot or take you away to a death camp. It must have been very difficult for everyone back then - I imagine that most of those who were too scared to do anything (or TRY to do anything) about what was going on must have carried a fair amount of guilt with them to their graves. I can also understand there being a fair amount who just could not believe that such rumoured atrocities were being carried out - a genteel lady in the 1930s/1940s would have had a hard time wrapping her mind around what she was hearing.
Remember too, it was required for ALL young men to join the Youth Army - and there they were "brainwashed" into the "master race" idea. Hitler was really a mastermind at controlling a huge number of people. When it's drilled into your head at age 16 how filthy Jews were, how they'd steal from you given any opportunity, how they were sullying up Germany just by living there, not to mention inter-breeding ..... well, I can see how hatred could stem from such vile lies. They took impressionable youths and fed them a bunch of awful lies in order to gan their cooperation - that's how they got such an army together that would carry out Hitler's orders. It's not that hard to comprehend. I actually feel sorry for the army men who were led into performing such acts, and then when the war was over and all the truths came to light about what the camps were like etc., those men realized what atocities they'd actually had a hand in .... it must have been a terrible thing to live with. I'm sure many repented, and many probably committed suicide because they couldn't live with themselves. I have some compassion for all involved in the Holocaust (except the ones who masterminded it all, and the ones who enjoyed what they were doing), though obviously I have the most compassion for those who suffered the most i.e. the victms and their families. And I am in awe of those who risked their lives for their principles - not everyone has that courage.