The history that you described of African slave traders needs to be publicized. Most people think whites sold Africans into slavery. This is one of those revisionist thoughts like teh Civil War was fought to free the slaves.
Do you have some online references for what you assert?
The skinny: Muslims were enslaving black Africans before the corpse of their pedophile prophet was even cold and probably before.
Europeans didn't even get the idea until the Portuguese started exploring Africa in the 15th century and were introduced to this sorry practice by Muslims.