Federal supremacy was in the constitution from the beginning. That was why General Lee was called out to put down the insurrection in Pennsylvania, and later, his son was called out to put down insurrection in Virginia.
You are going to insist on equating an independence movement with an insurrection. What is the point in bothering to discuss this with you? You see no similarity to what the Colonies did to England, and what the Confederates did with the US, and so as far as you are concerned it was just a bunch of renegade troublemakers that needed to have been shot. I dare say it might not be long before all conservatives are regarded as such by our Federal Masters. And I expect them to have much the same attitude as you. "How dare anyone tell us they don't want our rule!"
Objective you are not. You are not a student of History, you are a cheer leader for your football team, and it doesn't matter what are the facts, you are going to spin them so that your favored side will always win in your mind.
When you develop a serious side, let me know. At that point, you might be worth having a discussion with.