There is one way to enter the union - through Congress. There are two ways to leave - through Congress or by rebellion. The southern slaver aristocracy chose the latter. They chose poorly.
Yes, someone from the freedom loving state of Washington would say that.
You guys won. But that doesn’t mean what you collectively did to accomplish that was forgotten.
This is like saying there are two ways to leave the English Union. By petitioning Parliament or by asserting your Independence.
The US chose the later. They chose exactly correctly. The Southerners chose the same path.