Actually, the Black Muslim thing goes back to the sixties and the Countercultural Revolution, interrelated to the Martin Luther King freedom movement.
A lot of blacks were persuaded that Christianity was a “plantation religion” imposed on them by their southern white masters. So they invented the Black Muslim movement and various offshoots.
This was, of course, complete ignorance of history, since it was Catholic Christianity that did away with the slavery Europe inherited from the ancient world, and English Christianity that did away with the slave trade, and New England Christianity that motivated the emancipation movement in the civil war.
During the Age of Exploration, Europeans went out and found slavery in other parts of the world. Some Europeans jumped at what they found as a nice source of profit. But the Pope argued against it and forbade it in South America, and English Protestants finished that job.
It was, in fact, mainly Muslims who were engaged in the slave trade. Islam not only condones slavery, but advocates slavery through the example of Muhammed. And slavery is still practiced in Muslim countries, wherever they can get away with it.
Sheer ignorance, not only on the part of the blacks who founded the Black Muslims, but on the part of white liberals who egged them on and helped them rewrite or ignore history.
That’s all very true.
Another interesting thing is that slavery had virtually died out in Europe until it revived through contacts with Islamic slave trading practices (mostly in the course of attempts to ransom and retrieve the thousands of Europeans who had been captured by the Muslims and sold into slavery).
Remember the remark Muhammad Ali made when he returned from the Congo after his "rumble in the jungle" with George Foreman?
Some reporter asked him what he thought of Africa and his first words were "Thank God my great-granddaddy got on that slave ship. Thank God I was born in America."
That's a lovely story, but utter garbage.
Slavery wasn't outlawed in Brazil until 1888, and last time I checked Brazil was and is a Catholic country.
In the United States, there were people who used Christianity to argue against slavery, and there were people who used Christianity to argue in favor of slavery.