Thank you for not quote-mining that time. I was explaining it was not the barbaric thing you said it was, and while you said that foreign slaves could be kept for life, you disingenuously left out the fact that it wasn't mandatory. THe way you said sounded like you were trying to say there was no option of freedom for foreign slaves, and were misrepresenting it by trying to make it look more extreme than it really was.
You insist doing it at all is barbaric; why is it barbaric with those guidelines? They still had human rights. As for modern standards, modern standards and judgement aren't flawless, so how can modern standards say that's right? Look at all the politicking, corrupt media practices and gender-based double standards for three examples Saying it's bad because "it's bad by modern standards" runs the risk of turning into the "Appeal to Novelty" fallacy.
https://www.softschools.com/examples/fallacies/appeal_to_novelty_examples/437/
If the Qu'ran hypothetically had those rule, yes I would be okay with that.
How is legally owning another person inhumane if they still have human rights within that? Is it inhumane to have prisoners of war do labor? Is it inhumane to legally own someone when they volunteer for it? Whatever happened to "live and let live"? The dictionary definition of inhumane is "without compassion for misery or suffering; cruel." There is compassion in those standards which includes misery or suffering. They could own property, have families, weren't segregated, etc... and it was usually temporary (even if your hypothetical scenario ever happened, slaves being freed was far more common, and it's disingenuous to deny that like you have been doing).
You prove yourself someone prejudiced against Christianity rather than someone who hates all religions, and you also lack rationality; were you truly rational and as against these other religions, you'd research them too and attack them just as much, but you admitted you don't research them, further proving your prejudice.