African blacks sold their own people into slavery.
In fact, they hold all the records for selling people into slavery.
Do they? Could you provide us with a cite to those "records"? What you fail to mention regarding African vs. American slavery is the racial component that was added to the system in the Americas. In the past one became a slave as the result of war, debt or criminality. In America, even when manumitted, the ex-slave was not the equal of other citizens, a situation that we're seeing the effects of to this day.
That's pure horse shit. North African Arabs were enslaving whites for a thousand years. Why do you think Thomas Jefferson sent ships and U.S. marines to fight on the shores of Tripoli? To this day, Arabs are enslaving blacks.
The treatment of white galley slaves was even worse than the treatment of black slaves picking cotton. But there are no movies or television dramas about it comparable to Roots, and our schools and colleges don't pound it into the heads of students.
Everything liberals believe is a big fat lie.
Those enslavements weren't because they were white. N.A. Arabs were also white. They were because they were victims state-sponsored piracy and non-Muslims. I guess I should add religion as a reason for slavery, but there was no racial component and any freed slave who became a Muslim would have the same rights as any other citizen of his station. That was not true for freed blacks in the U.S.