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.
That is purely a case of DiogenesLamp believing what he wishes, not what was.
In fact, Corwin was a Democrat effort to "compromise", and was opposed by most Republicans.
It may have helped keep Border Slave-States in the Union, but those States had virtually no Republicans, zero, so this had little to do with Republican motives beyond helping keep Border States in the Union.
On the other hand, abolition had nothing to do with DiogenesLamp's alleged Northeastern economic factors, since economically slavery produced great cotton-wealth for the nation -- those "Northeastern Power Brokers" had no objections to slavery.
What truly drove emancipation was, first & foremost, military necessity, "Contraband of War" needed for victory.
And since military necessity matched up perfectly with average Republican anti-slavery moral convictions, emancipation was an easy sell for Lincoln & Congress.
So we can only guess that DiogenesLamp, having once drunk the Lost Cause Koolaid, now his mind is shot and he just can't see anything else.
I would imagine a dolt like you wouldn’t respect a man whose vocation in life is as a professor of history, a man of letters who has no doubt educated a few generations of young people in his tenure.
Too bad you aren’t smart enough to show any humility and learn from the man but then you’ve shown yourself to be about as receptive to any learning as a barnyard mule.