Yes, of course. My point is that secession is a different issue today, and the means and outcome could be radically different. as long as Texans don;t try to take over federal bases, etc., no firing on the fort, then it has a very different feel.
I would expect the feds to at least put up a token fight, to make things look good. The conspiracy theory material I am familiar with has the US broken into 11 or 12 regions. states retain their ID, but the government structures are aligned differently. I think it would be an easy sell to the perople - get rid of the unnecessary, overbearing, and arrogant overhead that is Washington! You can be "sort of united," common culture, diversity everywhere, etc.
Confusing borders is a bit new to USA, but it is common in Europe and the Middle East. No reason it can't be done in the US, to the benefit of the controlling families.
Not going to be as cut & dry as you assume it might be, at least in my humble opinion.
It will become even worse if more states soon followed Texas into secession.