It’s a fun one, though, because JKR’s whole life and works involve strong themes surrounding eugenics.

So it’s really not that far of a stretch to make this association in her case.

In her books the wizards fight against wizard Hitler and his eugenic holocaust. In real life, she engages in her own form of eugenic crusade where she believes the sex organs you are born with define your personality, identity, and your criminal tendencies.