Hitler’s anti-semitism was inspired by the Protocols of Zion, written by Russians.
I posted my reply before I saw yours.
Anti-Semitism existed since the crucifixion, but the biggest single impetus on the Nazi movement in Germany belongs to the teachings of Martin Luther.
Jews were already despised in Germany before Hitler. The Great Depression, in conjunction with the advent of Hitler, propelled it into the forefront.
While another poster called me historically ignorant, I am fairly certain that Luther predated The Protocols of Zion.