The deal was to not treat the south as a conquered state and the south wouldn't act like one.

Fascinating, I never knew that. When I was growing up (not in the South but in a "border" state) there was not much derision for the Confederacy in education, even in "Social Studies" classes. The Civil War was just treated as a national tragedy, the war of brother against brother. It was credited with ending slavery, but that was the past and we couldn't judge them by today's standards. The South wasn't "evil". Gone With the Wind and The Dukes of Hazzard were considered classic American entertainment. This wasn't that long ago.

It was only years later that I started seeing anti-South thought become more prominent, I suppose emanating from leftist academia and Hollywood. I learned that people in Northern cities had a completely different education growing up. While we were learning about the complex issues that led to strife between the states, they were learning that the Confederacy was evil. They were proud that the noble Union conquered the rotten plantation owners. It was just funny to me at the time how different states teach different things, but now I realize that was an early warning sign of the cultural divide that exists today.