Hitler believe the Aryan race was the chosen race (I think there is something biblical about choses people also) but the gene pool had deteriorated (where have I heard about the human gene-pool deteriorating since the fall of man after eating the apple ...) and his goal was to re-purify the gene-pool. This is perfectly consistent with even the beliefs of the creationist ...That things degrade, is a common assumption. That it is reversible by man, is not a belief held by Christians concerning the fall.
Wanna take a guess where that idea came from?