Laurie VossAn interesting thing I learned from Eleanor Roosevelt's biography is that Hitler used the USA's treatment of black people as justification for his treatment of Jews, and this was widely regarded *in the USA* as a reasonable point and a reason to stay out of the war: "we would have to stop mistreatment of black people".
The Skeptic's Book of Lists@seldo I remember reading about Ohio Congressman Chilton White who wanted to keep Black Americans out of the republic's army during the Civil War. Yes, they were badly needed to fight the south but he argued think of the ramifications... once Black Americans got a taste for killing white people, there would be no way to put that genie back in the bottle. Black American soldiers would turn on white people everywhere with a kind of unquenchable blood lust.
White went on to vote no on the Thirteenth Amendment...