One thing that really doomed Nazi Germany in the end was the utterly insane idea that Germany could do to 100 million modern Europeans in a few years what European white settlers had done to 10 million pre-modern Native Americans over three centuries.
You would need a completely different, sane "Napoleonic" Hitler that is no racist fanatic, basically aims to rebuild what Wilhelmine Germany had almost grasped, with fascist ruthlessness but all the necessary diplomatic and geopolitical savy: unite all German-speaking peoples, Germanize those West Slav lands that round up the Germansphere economically and strategically (Czechia and Western Poland), establish economic-political hegemony over Central and Eastern Europe, only make war to Soviet Russia if you have the support or benevolent neutrality of the Western powers (not too hard to get in the 1930s) and with the maximum war aim of carving out non-Russian nationalities as client states, whose loyalty one wins over by offering them a economic-political deal somewhat better than Stalinism (really not hard to do, even for a fascist). Such a program would have been wholly acceptable to the Western powers if Germany does not implement it like an incontrollable and untrustworthy rabid dog, using naked military aggression as the means of choice and breaking pacts before their ink was dry. And if you need a scapegoat, for Heaven's sake don't pick a minority that is blatantly peaceful, loyal, and productive, has a lot of influence in great powers whose support or benevolence you absolutely need, and includes a sizable part of your best educated elite. Britain was eager to have a powerful reliable Germany to use as an anti-Soviet bulwalk.