The federal gummint dishonorably violated the South's opt-out agreement with the Union as a condition for joining it to begin with. The South was obviously bamboozled and had their sovereignty ignored than stolen.
Fact is the Union also bamboozled and reneged on many such agreements with the injun nations as well.
There was no “opt-out agreement”. Nor was there any tyranny - you should know better by now.
Jeez Reb, BroJoeK lays out the subject spot on and your still cling to your fiction.