What you are saying is black slavery and the importation of blacks into our country was and is a great tragedy. It was and is. I have great doubts that the two races can ever live together in harmony.
Blacks represented 13% of the population and are still at that percentage.
They are a non-viable subgroup in America, their population would have been reduced substantially if not for the subsidies they receive from taxpayers.
They have pledged their allegiance to Marxists and enemies foreign and domestic.
Eliminating the welfare state would result in a reduction of the US black population by 2% per decade.
Combined with Repeal of the Immigration Act of 1965, the nations demographics will return to normal, with peace and prosperity for people of all races who embrace the American culture and work ethic.