I think the conversation thus far is also missing the important element of communism/Bolshevism as essential to Nazi ideology, popularity, and the very niche it gained support out of in the first place. The NSDAP gained its credentials as a party that contested the communists on the streets, and it took power largely on the basis that it was able to present itself as the only party with the ability to stop the left. Which it promptly did. The NSDAP, from its formative experiences in the revolutionary trauma of 1918 onwards, must be virulently anti-communist. Where is international communism? In the east. Hitler didn’t hate Slavs just because of pre-existing German colonial ambitions in the east, but perhaps equally because of the existence of the USSR and the idea that it was the center of power for international Jewry.
France and the western Entente was despised, but the fear of the USSR and the lived experience of the revolution in Germany forged the NSDAP and thus a practically unchange-able plank was the destruction of Bolshevism. And this plank was what created a lot of their success in local level organizing and campaigning in the first place. To emulate its OTL successes and to even be remotely recognizable as a interwar fascist party, the NSDAP must necessarily be anti-communist. With this, and existing German ideas about Slavs and eastern dreams, plus the very existence of the USSR, overdetermines a drive towards anti-Slav policies. And I’m not even talking about Poland here, which is also a massive elephant in the room. The west simply does not have the same place here. If we suppose Hitler hits his head or just formulates different ideas, the simple answer is that his party won’t be the NSDAP. He necessarily must be less anti-communist, which means an entire change in strategy and messaging, which means it’s doubtful he even achieves anything on a national level at all. Dying France red and painting Russia white creates more problems than it solves here, and Russian emigres were crucial to the ideological formation of the NSDAP anyway.
I think it’s an interesting question worthy of discussion, but this same question has been thoroughly answered before and I stick with the idea that this is just too implausible. It’s plausible if you create an entirely different timeline with a different Great War and interwar with different social, material, and ideological factors driving a mass fascistic party with genocidal designs on certain territories in Western Europe. But it won’t be OTL’s NSDAP or OTL’s Hitler in any meaningful way. You need to change too much to make it happen.