Little known fact is that Arabs enslaved many times more black africans than the Colonial western powers, including the US did.
yup, and who sold the Blacks to the Spaniards & Portughese anyhow? Arab slave masters of course!
Actually I think it would be more accurate to say that Arabs went through slaves at a much higher rate than westerners. North American slaves from circa 1750 were majority born in North America. There was never a majority of slaves born in Arab lands because they killed their slaves at a much higher rate.
The Sultan of Zanzibar was rather distraught when the Royal navy told him that the slave market would be shut down permanently or else (gun boat in harbor).