I wanted a place to put a simple observation and this seems to be the place. I recently watched the Netflix film "Mudbound" -- I highly recommend it, the acting is fantastic, the story is more real than we'd like it to be.
Later I remembered a line from it, about how the black guy who served in WWII was slapped on the butt by a European girl who explained to him that the white GIs had told her the blacks were more monkey than human, so she was checking for a tail. Evidence that human descent from an apelike forbear had become the content of current racism.
I haven't read much of this thread but enough to know that people fight the idea that the theory of evolution has anything to do with racism. But historically it is known to have fueled racism. Historically Hitler did make use of it, and so did Margaret Sanger who promoted abortion -- she had in mind mostly blacks, and she was a proponent of eugenics, as was Hitler.
Of course the ToE didn't invent racism, that was already part of human experience, a form of tribalism I guess. But there is no doubt the idea that humans descend from an apelike ancestor, and that human origins are often traced to Africa, fuels the idea that there are levels of human beings, more evolved and less evolved human beings. If it was just a matter of built-in variation of the Kind there wouldn't be levels, it takes the idea of evolution to bring in levels, although granted, that is a popular misunderstanding and officially there is no reason to think in terms of progress in evolution. Supposedly anyway. I think it's the natural conclusion but OK you can claim it's a mistake.
There was racism even before evolution of course, and the hard thing to grasp is how it could have coexisted with Christianity since Biblically it is very clear we are all descended from one set of human parents, so we're all cousins.