Two things, can you point to anyone/anything granting Abraham Lincoln the power to act as a moral surrogate for our Lord and Saviour? Jesus Christ healed the slave of a Roman centurion while praising the guard for his faith - never once did He condemn him.
And two, can you cite any Biblical verse that condemns slavery or slaveowners? In I Tim 6 slaves are exhorted to praise their masters and in Exodus 21 the guidelines of the sale and treatment of slaves are proscribed.
1. How sure are you that the guy Jesus healed was a slave? The word used "pais," IIRC) is so ambiguous that gay theologians claim it means he was the Centurion's live-in boyfriend. Thayer and Smith's lexicon lists these as possible meanings: a child, boy or girl, infants, children, servant, slave, an attendant, servant, specifically a king's attendant, minister. Slave is only one option.
BTW, you may have noticed that Jesus didn't condemn a lot of people who were obvious sinners. Take the woman caught in adultery for example.
2. Are you actually comparing the slavery the Greeks, Romans and Jews practiced with the chattel slavery practiced in the American South?
3. If chattel slavery is so cool with the Almighty, why did he whomp Egypt so hard prior to the Exodus?
4. If the Almighty is OK with slavery and slavery was a legitimate state's rights issue, would you support repealing the 13th Amendment returning the issue to the states? If not, why not?
5. Oh, and passages of scripture condemning slavery? Try this one. I'm not aware of many business operations that the Bible compares to adultery and sexual perversion.