Quote the text...
Book and chapter and verse.
Likewise slavery did not begin until Genesis 10.
To say that because slavery is in the Bible means that it is good is no different then saying that because pologmy is in the Bible (it begins in Gen.4), that it should be acceptable also.
God did not intend man to be a slave or to have more then one wife.
Your Confederacy was fighting to keep slavery alive as a virtue, just like you and your buddies are arguing for it now.
The Confederacy was anti-American and thus, Anti-Freedom