Reparations Ain't The Only Thing Said To Never Happen

I'm getting a special thrill these days, from conservatives, saying blacks should be "grateful" to be here: 

"No matter how much a black family tried to emulate the values and virtues of the middle class, that family was still likely to be punished, humiliated and to falter. Against that history, the claim of conservatives like Charles Murray that the crisis of black poverty can be explained as the moral failing of individuals is the worst kind of smugness."

Has anyone ever done a study, on the level of harm  misinformation might inflict, on the lives of black folks? Since whites are the majority, what happens when another racist meme - like blacks having "bad culture" - smears us? Is it amplified in proportion to white's numbers? FOX News'? 

And what physical effects, if any, manifest? Does violence go up? Domestic violence? Interracial attacks? Police? How long does history say it *usually* takes for white people, to come to their senses, after they've truly lost it?

Wait - stupid question - let's just move on,…