After WWI Adolf Hitler joins the Nazi party and leads them to victory in the 1933 election. Hitler is a decorated, fiercely nationalistic veteran seeking to regain Germany's lost territories, reverse the terms of the Armistice, and prevent Germany becoming Communist. He is also a practising Jew.
In this alternative history Alois Schicklgruber/Hitler is promised an inheritance from his enstranged Jewish father Frankenberger if he marries a Jewess and raises his children Jewish. As a result, his son Adolf is enrolled as a student of the local rabbi, rather than a Catholic altar-server.
What would Nazism be like without antisemitism? Would Hitler blame the liberals, socialists and Slavs for Germany's defeat, or would he persecute the un-assimilated Eastern Jews?