It actually harms their argument about racism and how pervasive it supposedly is in our society.

I watched the love action Lady and the Tramp with my kids. Set in the early 1900s New Orleans, every scene had couples that were biracial. We know from history this didn't openly happen in the American south at this time.

So if you're a kid today and this influences your concept of history, there was no racism. What then, is the big deal about the civil rights movement? or MLk?