I think most "racism" is mislabeled cultural bias. The IAT, or Implicit Awareness Test, has shown racial bias, even black on black bias. The theory is that people have bias based on how POC are portrayed on television or by society. I don't think they've gone deep enough, meaning that people naturally associate skin color to cultural behavior, not the other way around. Stereotyping and generalization is part of human reasoning and problem solving. I feel that the current push to force POC in advertisements and television and movie roles is more for POC to break these cultural boundaries than for non-POC to accept them into theirs.