I didn't cherry pick. Saying that German scientists worked for Hitler doesn't imply they were doing science. Where does it say that anything useful came out of Nazi "science"?
Farmers and animal breeders sterilize animals every day. They are practicing a trade that goes back thousands of years. It has no connection to Darwin.
actually unless humans are special (set apart from nature), it would just be another environmental condition. just as much a part of natural selection as if a lion selects for the fastest to breed by eliminating the slow.