The right of secession from an oppressive political body is an inalienable right that predates teh US.
In fact, if there were no right of secession, the US would never have existed, considering it was created by an act of secession.
I understood that and agree in principle. However, I thought that by Texas you were referring to its specific reservation of the option to secede upon its acceptance to the Union. That option is now void since it "reapplied" for acceptance pursuant to the surrender of the Confederacy. The only basis for secession that now remains for Texas is by force, just like all the rest of the states. Hence, Texas now enjoys no special status as regards the right to secede.
Good luck with that.