Most "white" people in America today were never treated like property the way black people have been in america for generations. Most "white" people in America have never dealt with the degree of dehumanization that occurred to black people in America. The degree of what has happened to black people in America is overwhelmingly moreso than any other race save for Native Americans.

It's extremely important to acknowledge that the barriers to social cohesion for certain races are significantly higher than others. We are in living memory where black children had to be accompanied by the military for their protection because they dared attend the same school as white people.