Nazi ideology was based on the supposed separate creation of a succession of "Root Races", based largely on the theories of Scott-Elliot and Besant. In other words, they were creationists.
Root races has nothing to do with creationism since according to Genesis 1 all men are created in God’s image and are thus equal. In the 1800’s Darwinism was loaded to the gills full of racism until they became more politically correct after World War II.
Hitler spoke of fixed kinds “A fox will always be a fox”.
Genetic diversity is good for a population if one understands evolution. Hitler thought that diversity consisted of a dichotomy of “weak” and “strong” and sought to (through government action) eliminate the so-called “weak”.
Creationists cannot seem to escape blatant lies and historic revisionism. From testimony on the stand at Dover to the constant false equivalence of acceptance of a scientific theory with Nazism, Communism, or atheism - complete with accompanying historic revisionism - those that think they are on the side of God cannot seem to help serving the father of lies.