Assuming Hitler is killed in the 1920's, lets say during the Munich Putsch attempt, and Europe isn't involved in another world war, what happens to the German scientific renaissance? In the 1920's Germany managed to receive (or rather her citizens) more nobel prizes than the rest of the world put together. However during the 1930's with the rise of right wing extremism, many of the very best mind fled to the US or Britain, never to return. Among the German-Jewish community, which contained a disproportionate share of the very educated professions like doctors, lawyers, teachers, etc., the loss was near total, depriving Germany of a solid base of future intellectuals and professionals.
After the war many of the remaining scientists moved abroad (or were forced to), further reducing the already weakened community. Even today Germany has not fully recovered the loss of so much of her intelligentsia.
How would Germany fare in the sciences today had her scientific and intellectual communities never been disrupted?