Their actions where intended to cause the conflict that led to their downfall then.
walked away from obligations for debt and treatiesTreaties were when they were under the Feds, they were void to them afterwards.
So the Constitution protects theft by walking away? Really?
Their share of the debt could have been negotiated like civilized human beings.
But they didn't negotiate like civilized human beings. They walked out without discussion or negotiation of any potential issues of disagreement and your response to that was, "Yes,so?"
Could you point me to discussions where the Feds tried to communicate with the Confederacy for compensation, or where the Confederacy refused?
Can you point to me when the South did likewise?
None of this comes close to justifying 600,000 dead and Lincolns persecution of Politicians, Judges, and Activists who opposed him.
Again, if it does not justify the 600,000 dead then why did the South start the war that led to those deaths?