You have to be very careful in what you think the answer to this question is. It was the task of the Nazis to make the Jewish people as unattractive as they possibly could. Big noses, conformity to head shape, beards (unkept) for the men, completely unattractive women.
These ideas and many others like them were taught in classrooms. There were many fields that contributed to showing that Jews were inferior genetically and Germany had to be cleansed of their presence.
