Let me help you with this.
" to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, --That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness.
This is easy. The only thing required is "consent of the governed."
Once the "governed" have withdrawn their consent, they have a right to form a new government.
Basic freedom right there.
I agree 100%, that's what you firmly believe.
But, it's not what our Founders said, ever.
What they said instead had everything to do with "a long train of abuses and usurpations", and nothing whatever to do with an alleged unlimited "right of secession" at pleasure.
Indeed, the whole idea of secession at pleasure was anathema to them, as clearly spelled out by the Father of the Constitution, Pres. James Madison: