Margaret Sanger?
Yup. You got it.
Although she denied it, she claimed there were three types of people and those she considered on the lowest class should not be allowed to procreate.
She also claimed that she was shocked by the Nazi method of her admired system of murder and founded/joined a social group against that. Yet she fully supported selective breeding and the prevention of those who were deemed not fit. The Nazis took this to a new level and administered it and she, along with her cohorts, are as guilty as any of them.
The B*&ch should have been shot along with the rest of them.