The Black Muslim Movement started in the late 50 and early 60s by Elijah Mohammed taught blacks how to be self sufficient and showed the history of racism by white christians and how those same white christians used the Bible to justify the negative treatments of blacks and other minorities (similar to how the British justified the treatment of Aboriginies in your country, initially). Christianity was seen as a 'white' religion. It doesn't happen as much now, except in prison. Simply because they have found to be just as corrupt and immoral as any Christian sect.