The states are what matter. We had a union of the several states. At one time, those states ratified the Constitution, but time passed and that union of states was not necessarily permanent. When several states decided to leave that union and form a separate union, there was nothing inherently treasonous or illegal about it. They tried to leave peacefully, through a political process invovling state legislatures. But Lincoln sent an army into Virginia to thwart the will of the people.
You see treason. I see tyranny.
And here we are. How do you find our destination?