“Their concept of self rule was to deny self rule to US states which did not permit slavery,”
Nonsense.
“to the US government which was a union of the people which preceded the US constitution,”
Utter nonsense.
“and to steal US property and imprison US citizens who did not support slavery.”
Time for meds.
Instead of blabbing, try factual discourse.
Southern states didn’t want US states which did not permit slavery to be able to ban slavery. Personal liberty laws, which delineated the procedures that slave catchers had to use in northern states were held unconstitutional, denying self rule to US states which banned slavery.
Slave catchers would, given their inability to get cooperation by state officials, support in the north, to kidnap poor whites, get false papers, and sell the kidnapped whites as slaves to cooperative slave owners such as R.E. Lee. That was one reason why slaves at Arlington over time became more and more white. The other was of course the raping of slaves by their putative masters.