Misinformation. They inherited their own Christian religion from ancestral slaves, who were introduced to Christianity by their southern owners. Christianity had nothing to do with causing the slave movement in the US, but the usual suspects pretended that it did. They told blacks in the desegregation days that they should move as far away from their Southern Christian slave owners as possible--by abandoning Christianity and becoming Muslims.
They forgot to mention that Islam DOES promote slavery, unlike Christianity. Slavery disappeared from the Christian west, but it was widespread and approved by Allah in all the Muslim countries. And the black slaves in America were mostly enslaved and sold by Muslims in Africa. And they were freed by Northern Christians who were Republicans.
Anyway, the usual suspects told blacks that Christians are slavers and Republicans are slavers, and they believed both stories. That was the origin of the Black Muslim movement.
Very informative reply. Thanks