Oh? Didn't see that spelled out in Article I.10, nor in Article IV, nor anywhere else in the enumeration of requirements and limitations of a State.
In fact, if we undertake your assertion that the Southern States never left the Union, then according to IV.4 Lincoln is the biggest criminal and traitor in U.S. History for inflicting upon those States the 'domestic violence' the Constitution demands he protect them from. So that argument is a non-starter.
As for your other comical assertions, please refer to:
Amendment IX
The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.
Amendment X
The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.
Unless your argument is that these, along with other large tracts of the original document have been effectively dead letters since 1865? I'd agree with that, and the nation as it stand today is a direct result of the Constitution being an interpretive, 'living document' whose plain words mean not what they say, but whatever is convenient for the day. In a world of honorable governance, this can be an expediency that provides benefit. Of course, you'd also be living in a Bizarro alternate universe, since the one unchanging engine of history is corruptability and will to power.
The Framers designed the Constitution as they did, not to guarantee regular gatherings for tea and scones, but to prevent the success of the will to power. When their words no longer carry weight, the chains are loosed, and the men of power usurp the word of law. Which makes up different from every other pissant banana republic only in nomenclature.
Is this what you are in favor of?
Amendment X The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.
These didn't operate in the case of the rebellion.
The supremacy clause says the laws made in pursuance to the Constitution are the supreme law of the land. The federalists made sure to pass the Judiciary Act of 1789 and the Militia Act of 1792 (modified in 1795). These two acts make unilateral state secession impossible.
Walt