Or how about if the USA turns into a totalitarian leftist nightmare, does Texas have the right to become independent?
There are pros and cons of either choice, saying that provinces have the right to self determination or do not.
But a choice needs to be made and it needs to be consistent.
There are provinces all over the world that would love to split off.
You have a valid point about Texas. However, the equivalent would be the following:
What if Mexico moves 20 million people into Texas, and holds a referendum for Texas to join Mexico.
Russia moved people/troops/infrastructure in, and is forcing a region to vote to join them.
It’s a hostile takeover/invasion of a region.
ie, it’s not Kosovo, it’s Kuwait.