[Texas Federalist]

I don't recognize any individual or group “right” or “power” to remove my state from the union.

"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."

[Durus]

There is a fundamental difference between a civil war and a revolutionary war. There is a marked difference between succession and revolution as well.