Actually, racists of Darwin's day assailed him for opposing slavery and for him arguing that if one brought uncivlilized people to England, in a few generations,they'd be just like Englishmen. That really got them going, particularly in the Southern United States, where blacks were often not even considered humans. Agassiz, one prominent anti-Darwinist, even said that blacks were not descended from Adam and Eve.
Darwin thought some races were more developed than others, but modern evolutionary theory has shown that there are no biological human races. Unfortunately, many creationists, even into the 1990s, were still writing foolish attacks on black people for their supposed intellectual and spiritual inferiority. Henry Morris, of the ICR was one of these. It's one of the major differences between science and creationism. And no, not all creationists are racists. Many are not. Some, even in Darwin's time, joined with him in opposing slavery.
In the United States, creationists like Dr. William Tinkel were enthusiastic eugenics supporters, even after Darwinists like Morgan and Punnet had shown that eugenic beliefs were scientifically unsupportable. Dr. Tinkle was later appalled to find that his ideas were taken by Hitler and (along with Martin Luther's advice on Jewish people) perverted to horrible ends.
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