The question that comes to mind is, exactly how many ex-slaves are alive today? Given that slavery ended in 1864, one would need to be at least 149 years old to have even been an infant, newborn, when slavery still existed in America. I suppose there were still slave raids in Africa after that, but they didn’t have a legal market in the U.S..
There has been a racial divide in our society, kept alive by the apartheid of forced integration, professional racists who provide separatist cultural elements like “Kwanza”, and generational indoctrination, such as that which teaches us that blacks need to have a dumbed down curriculum because they can’t learn white lessons like math, science and English as well as other races.
If you have never been stopped and questioned for walking in the wrong neighborhood, you probably wouldn’t understand that the color difference of greatest significance is that between light green and dark green.