Anytime they want
Bad times only
I don't know
It was the last violation and the most blatant. It was on their minds at the time and what they were still enraged about the most. Shocking they focused on it.It wasn't about slavery is the lie that started with Jefferson Davis, because he didn't want to look like the bad guy, and it continues with people who don't want to seem like a racist when they defend the Confederacy. But, it was, according to th VP of the CSA, the "cornerstone."
In other words, you admit the South was not traitor to the Constitution. The damnyankee was because he comes under a higher law.
Your and you're is a common mistake of mine.