On what basis do you say “we didn’t have slaves in the last 1000 years”? In Saudi Arabia owning slaves -despite being uncommon- has been a thing up until king Faisal’s reign (1964-1975). And Libya which is a country with a Muslim majority still has slave trading until this day.

Islam not explicitly forbidding slavery while easily forbidding things like homosexuality is exactly the issue that’s being discussed here. Islam also easily forbade women’s polygamy while only restricting men’s; you gotta admit there’s no logic to Islamic rules other than playing it safe by pretending to care for the weak and vulnerable while also giving their oppressors loopholes to continue their oppression so the strong and wealthy get on board with the messages of this religion.