In Southern Sudan, Muslims would attack the local tribes and when asked why they were attacking fellow Muslims, the reason given was, "because they were black and inferior."^^^^^^ That policy ended in 1968....which was 50 years ago.
Plenty of time for black people to get their act together and quite blaming the white man for all their problems. ....
Debating uneducated idiots is tiring. Actually the policy not stop in 1968. The issue remains very much a problem now. The white man will be blamed for what the white man has done. Quit doing it if you don't want to be blamed.
Most Asians don't like blacks.
Many Hispanics don't like blacks.
African blacks don't like American blacks.
and yes, of course, some Whites don't like blacks.
As for slavery, slavery has existed across the entire planet and the color of the slaves varied and slavery was officially outlawed in Saudi Arabia in 1962 and in Mauritania in 2007 or 2008, yet it still exists in some areas. In Islam they castrated the black males, hence you didn't see a huge growth of blacks in Islamic nations that weren't black.
Mankind has been primitive for much of its existence and both mankind's past and present continually reflect man's inhumanity towards his fellow man. All we can do is try to rise above hate, prejudice and violence and stop blaming races and instead treat the fellow you encounter, the way he or she treats you.