Let me rephrase, Christians shouldn't have treated slaves as people typically did. A servent is not unbiblical, but beating said slave is. That is why I'm saying they shouldn't have supported slaves, because of how they were treated. If slaves were treated with respect, it'd be different. Also if slavery wasn't based on race, didn't make the slave not a person, but rather treated the slave pretty much as a worker now a days except payment was food, shelter, water, clothing not money, then it would have been fine. There were countless issues with American slavery which is why a Christian shouldn't have had any. I don't know how they were in other nations.