Now that's just outright wrong. People mistreated their slaves plenty in history.
The USA to this day is still dealing with the cultural history of racist slave owners who treated their slaves of a different race as trash, and many to this day still see the former slave ethnicities as beneath them.
You can't say people didn't treat their slaves badly, that doesn't make sense when within the last 200 years we got racists making up shit like "well their skulls are shaped a certain way so they are the inferior primitive beings compared to us" (Phrenology), and we still got those racist people today.
Like read a book, European slave owners colonies in Africa were exactly like this but even worse. Look up Leopold 2 of Belgium, guy got 10 million people killed because of this same attitude you think only happens in fictional manga.
Human beings IRL will be this exact kind of scum, and we don't even need magic in our world or actually completely different fantasy races like elves/demihumans/etc to do it.
It's really sad when USA is the only place people associate with slavery. History is littered with slaves civilizations conquering and enslaving others. Christ, there's still slavery in Africa to day! People being bought and sold right tf now. I mean who do you think sold slaves in Africa to Europeans? Its fucked, but at least one of them stopped realized that and outlawed it.
And it's may have already been said but the post you call out says they didn't damage property. Of course they were treated poorly but they weren't beaten to the point they couldn't work. Wtf would you make a serious investment in a slave, then render them unable to be productive? A slave with a broken bone, mental disorder, infection from wound, or other preventable injury is throwing serious money away. It's like buying a car for work, then getting mad at and puncturing the tires or smashing the windshield. That's what they meant by damaging property.
We all agree they recieved inhumane treatment. So maybe having a farm dog would be a better analogy. If it has to protect lifestock and perform other tasks, you'd want it in peak physical condition. Maybe a few lashings for discipline (which is cruel to do to any living creature) but risking serious injury to it is just a stupid economical decision. Only wealthy people could buy and maintain slaves
I don't mean to downplay the legacy of American enslaved people. I'm black myself. But I don't like being manipulated by people with agendas who push false narratives for political gains. Most of my life I wondered if Afrian Americans would have been better off if colonialization never occured. Would we have a culture and economy worthy of envy by other countries? Would we have build giant cargo ships for trade, architecture worthy of awe, or clean vibrant cities people would want to immigrate to? Some may exist now but they are the exception. Shit, I mean whats the ration for countries with and without basic things like plumbing systems, roads or an energy grid so people have light at night? Africa wasn't the only continent rich in oil and that was colonized. Yet every other place "caught on" relatively quick once it ended.
When I saw Wakanda in Black Panther, I felt like we were being mocked in some way. Like it would take a magical mcguffin for black African countries to build infrasture on par with Western nations and provide meaningful contributions to science. Like all that is strictly in the realm of fantasy. All that's in Africa's future is liberal white college missionaries (and Mr BEast) visiting to build wells, then the village selling the metals for money. I'm overthinking it. It's so fcked.
Edit: spelling mistakes
