I disagree with you about the “about slavery” part but otherwise, you are correct. The Clairmont Institute Neocons sided with PCers to try to revise history starting in the 1980s. Prior to that even most in Academia recognized the importance of the economic differences such as the tariffs or federal government policies were the key driver in both secession and war. The Leftist PCers revived wartime and immediate postwar Yankee propaganda to try to demonize the South while sweeping completely under the rug the fact that they had been treating the South like their cash cow.
The Neocons have now largely returned to their Leftist roots....people like Bill Kristol, Max Boot etc are Democrats today. They were never on the Right. They just used the Right’s patriotism to get the foreign wars they wanted. So its really just open and avowed Leftists today who push the “all about slavery” myth. Just as I told everybody 25 years ago, it did not stop with the South’s history either. Now they’re tearing down statues of even the Founding Fathers, redesigning the stars and stripes, claiming America (not just the South) is at its core, racist, etc etc. All the same crap they threw at the South a generation ago.
They sowed the wind, now we are reaping the whirlwind.
"Neocons have now largely returned to their Leftist roots....people like Bill Kristol, Max Boot etc are Democrats communists today."