[Bull Snipe]

So the Southern States withdrew from the Union for absolutely no concrete reason, No rights violated by the Federal Government, but we are leaving the union to defend States Rights. Got it.

[DiogenesLamp]

So the Southern States withdrew from the Union for absolutely no concrete reason

They didn't need a reason. When one has a right to do something, one does not have to explain why one wishes to do it. A right allows one to do it without explaining why.