Blacks are the only ones who have ever been slaves. It’s like the noose. They are the only ones that have ever been hung. :0)
It’s important to remember it was blacks who sold other blacks into slavery. Without blacks running the slave making machine there would have been no slave trade. Whites and arabs weren’t going into the jungle to capture them.
In the south, there were thousands of blacks who owned slaves. One of the first free blacks actually became a slave trader and a slave breeder. He sold his own offspring into slavery.