What does that have to do with anything? When someone wishes to leave, they have a right to leave.
Second, yes, if that is true, the South should have let her slaves go, but fought a war to keep them.
Oh dear, such alot for you to learn.
When the constitution was ratified by the states it created a more perfect union of one people (the articles of confederation being somewhat deficient).
The constitution wisely assigned the exercise of powers to the federal and state governments, with all others being retained by the people themselves, the people being soverign.
Now this idea that the people being soverign was quite revolutionary as that was always held to be the right of kings or of the state.
But we made the people soverign. A part of the “one people” cannot just up and leave without approval of the rest of the people.
The south did not seek that approval and thus were in rebellion.
Using the events of 1776 or the Declaration will give you no aid in your arguments. The colonies were not treated as one with Britain, and colonists did not have English rights even though many were English born. This is the whole history of grievances leading up to 1776. If Britain had considered colonists equally and treated them as one people with themselves no revolution would have occurred. The principal grievence was not having representation in Parliament and thus no say in taxation, trade, ect.
The soverign people of the south who were one with the soverign people of the north had every right to a say, and had strong representation in Congress.
The fact that southern votes may not have carried a majority in all matters does not do away with the union of one people.
Southern apologist have long tried to make these two very different things seem the same in trying to legitimize their errors. The sad part of the apologists is that they are actually disgracing their forefathers who fought in 1776, and fought for ratification to create the one people. I always thought this was the biggest shame of the southern leaders in trying to refute by arms their own fathers and grandfathers 1776 beliefs.
The tragedy, of course, is that so many of our soverign people in the north and the south had to die to rectify this grievious error of thought.