Black American Muslims have always put Islam above color and heritage. Arabs and Muslims sold slaves and indeed still do long after the white Europeans and white Americans did. Black African slavery to the new world was largely ended because of the campaigning by white British Christians of an Evangelical bent. Today, as you probably know, black African Christians are brutally treated by Muslims with Darfur being a splendidly ignored example, and not a peep is heard from American Muslims of any color, or for that matter many self-proclaimed black American leaders who are ostensibly co-religionists of the victims in Darfur or many other parts of Africa. It's an interesting fact to that Christianity may be saved by black Africans who remain committed to an Orthodox non-watered down religion.
I have read that one of the reasons that chattel slavery was practiced in the British colonies was because of British contacts with Muslim slavers in Africa and the ME. It was prohibited in England itself, oddly enough, but was extremely hard to root out in other areas.
Even after the former British colonies in the US became US states, they were uncommonly harsh, even forbidding black slaves to receive religious instruction. Writers have speculated that this is because they based their model for the enslavement of Africans upon the Muslim model of slavery in Africa.
I've never understood why American blacks are so fond of Islam.
The people of Darfur are overwhelmingly Muslim.
Europeans and Christians sold slaves and also campaigned to maintain slavery. See for example, the South ca. 1850. Why do you chide black American Muslims for practicing Islam when you give black American Baptists a free pass?