I would be happy to do so.
In this particular instance these states were merely seeking to remove themselves from a union they joined after it was understood they could separate any time they felt the Union was over reaching it's agreed upon authorities. What you or I think about that, whether they were correct or not in their thinking matters not, they sought to remove themselves peacefully, leaving the federal government to be.
When it became apparent the federal government was unwilling to lets states out from under their control, when the federal government decided they need access to the monies of all the states that united, only then did it become necessary to have to fight for the right to leave.
And even then were the states able to leave the union they would have had no reason to overthrow the US federal government. That simply was not the intent of that war. As I suggested earlier, perhaps read up on the matter, from more than the one perspective you are already comfortable and content with, you may accidently learn something that has remained unknown to you all your life.
(I did say, "MAY")