Oh shut up! Bro Joe K cleans your clock and then you come sulking and feet stomping to me.
I don't even read much of what he writes anymore. He's too far "out there" in his thinking and his skewing of facts. It isn't even worth the trouble to argue with him so I don't bother most of the time.
There are a lot of people who will simply believe what they wish to believe regardless of factual information that demonstrates they are incorrect in their thinking.
The Corwin Amendment alone demonstrates that Slavery was negotiable to the Northern states.
No moral motivation on their part. Strictly economic.