A question for you SoonerATC: why do you consider 25,000 butt scratching, nose picking, booger eating individuals to be representative of the population of Texas? Why? That's the "why" we have to start with.
The "why" doesn't matter. Does a population have the right to self-determine their government?
Any people, anywhere, being inclined and having the power, have the right to rise up and shake off the existing government, and form a new one that suits them better. This is a most valuable and most sacred right - a right which we hope and believe is to liberate the world. Nor is this right confined to cases in which the whole people of an existing government may choose to exercise it. Any portion of such people that can, may revolutionize, and make their own, of so many of the territory as they inhabit.