I will give you a rather long version of why OP is a faggot and bit of history spergout. Führer's politics were shaped by the time He lived in, by contemporary challenges. There were many, most of them tied with the subversion done by international Jewry of that time. There were no 50 millions of Muslims in Europe back then, there were very little radical Islamism and dreams about Islam conquering the Europe were just that - dreams. Of course it was rational to try to gang up with them against the Jew. However from historic standpoint, it was:
also most importantly:
Now to the most interesting part - those 1300 years of constant warfare, destruction, slavery and violence between Muslim world and our white European one. Those things are well-known to most here and even though you are intentionally omitting it, I don't really see a reason to review it. However, there is also a Jewish question. What was the role of kikes in those 1300 years? Muslims hate them too, right? Well, it is not really true. Conflict with Muslims had three main events that shaped the whole shared history - first caliphate raids to Spain and south of Europe, European retaliation (reconquista and the crusades), and later Ottoman raids to the Balkans and Eastern Europe.
Let's look at caliphate raids first. Jews were persecuted by Europeans as they rightly should be. When the word that caliph is coming with a invasion army spread, Jews welcomed it and helped Muslims on many occasions, but directly and indirectly. Success of caliphate raids and establishing Muslim rule over Iberia then heralded the "the golden age of Jewish culture in Spain", which, I quote wikipedia now: "coincided with the Middle Ages in Europe, is a period of Muslim rule in much of the Iberian Peninsula during which, intermittently, Jews were generally accepted in society and Jewish religious, cultural, and economic life flourished." The Jews were the ones who made solid dosh by dealing with white European slaves - most of them females to Arabic harems, mind you. Later, during reconquista, the Jews were naturally driven out. You can take a wild guess where they run away and who welcomed them.
Crusades came as retaliation to Muslim aggression. The Jews were abundant in Saracen lands, enjoying good social status, very little suppression and usually held higher offices and once again, were prime players in slave trade of Europeans and others. Sure, they usually paid extra taxes as non-muslims, but that was it. When Crusaders first hit Holy land, the Jews actually physically defended Muslim strategic locations and high value targets. As rare as this is, it happened - the Jews actually risked their filthy lives and fought and died for their Muslim bros. And as before, when Muslims were defeated, kikes were killed as well.