Well I am intentionally using "your" because the person I am addressing has made this "mine vs. yours" in the OP. The point being, it was not the CSA who ruled slaves were property and not human beings. It was not the CSA who upheld this institution for 86 years before the CSA even existed. It was not Confederate Congress' and Presidents who passed this issue off and didn't deal with it. It was not Southern people alone who condoned and enabled the institution of slavery. To try and retrospectively make this the case, is dishonest and I won't stand for it.
The issue was about federal power over the states, specifically with regard to property ownership, which the US agreed that slaves were, up until the passage of the 13th and 14th Amendments to the Constitution, which happened AFTER the CW. It is horrible and abhorrent that our ancestors once considered black people to be 'property' and not human beings, and there were certainly people in 1861 who shared our modern viewpoints, but the overwhelming majority of people, did not honestly believe that black races were "equal" in any way, to white European races. That's just a fact of life and how things were in 1861, with few exceptions. If we ever expect to deal with racial relations, we have to begin by being completely honest about this, and not hiding behind a scapegoat, which is what you want to make "The South" out to be.