This is a bit of a non-sequitur? You couldn't just "choose to pretend to believe in Islam" and somehow escape slavery. And with castration having been a common practice, anything that was dependent on descendants was going to be different at face value. So, kudos to them for not allowing their slaves to continue their bloodline?

Look, I'm open to the idea that slavery in the US was somehow the worst slavery ever. But most arguments used to prop up the idea rely on laughably naive views on slavery elsewhere. Worse, much of it seems to stem from a naive "US bad" gullibility in taking in information.