I think that if more people resisted there would be a lot more people who were slaughtered, if they slaughtered that many Jews they wouldent have stop if there were a different group of people resisting. I think one of the main factors was that the groups they were killing weren't blond haired, and blue eyed.
They felt more powerfull during the war dur to the ffactire that they had alot more people to fight and their weapons were more advanced