“...and that no state could take any action to end the practice. That is why the “State Rights” argument is pure Male Bovine Scat.”
Could you provide the wording of the issue you cite?
Article 1 section 9 clause 4 of the Constitution of the Confederate States of America. “No bill of Attainder, ex-post facto law, or law denying or impairing the right of property in negro slaves shall be passed.”