Anti-Semitism was pretty common in a lot of places at the time (it still is in some circles, you may note), and the whole idea of eugenics was kind of an "in" t

Anti-Semitism was pretty common in a lot of places at the time (it still is in some circles, you may note), and the whole idea of eugenics was kind of an "in" thing in much of the scientific community at the time, too. It wasn't until Hitler came along and started implementing this stuff in a big and brutal way that the tide of opinion turned.