They've simply been promoted to living to serve the remainder of the population! (I'm just using the playbook from every movie for evil dictator justifications. Absolutely don't think this at all btw. Big /s after these statements if it wasn't clear. )

The idea is that the Nazis tried to create in their perverse fucked up way technical equality by exterminating everyone else that didn't conform to their vision and everyone else was equally removed from existence. Thus not all methods of getting to equality are valid or good and we should be careful about saying all methods of creating equality or mandating it are good.