The question for me isn't that racism, it's the Archie Bunker racism. I suspect it is far more prevalent and hard to measure. There are various tests, one where they have photos of people, each subject sees the same people but their skin tone is altered. So you might see a white and I might see a very dark-skinned black. Again, it is the same person. And the subject is asked to use a word to describe that person. Those studies show the lighter the skin, the more positive the descriptor. Can I prove that the people who use the more negative descriptor for darker skinned individuals are less likely to hire said darker skinned individual? No, I haven't seen that data. But it isn't crazy to think this would be the case.
They have done resume tests with people having names that sound "African-American". Identical resumes, one named Jane Smith and one named Lakisha Washington, and Jane gets interviews and Lakisha does not.
One source.
For some reason the idea that this sort of discrimination exists either is denied, or used to blame the minority with a "they should just try harder" response. The appropriate response is how can we end this sort of discrimination.
The role of the KKK and the nazis is to make Archie Bunker feel better about himself. The Archie Bunker thinks his brand of racism is OK because he has a much worse evil to compare it to. I was raised by Archie Bunker, in a neighborhood of Archie Bunkers. I'm not convinced there are fewer of them today.