A form of Social Darwinism.
Hitler's view were actually very similar to Madison Grant and Lothrop Stoddard. The idea that there was one unique aristocratic race that carried "the burden of civilization."
From here he assumes that there's a "natural order" in life devised by Nature. So he replaces God with nature and religious laws with nature laws that are immutable. Eugenics and blood are actually very similar as well. Since you can interchange the concept of "IQ" with "vitally of blood."