I am led to step back from the passions of this particular secession crisis and think about the principle at hand.
Imagine that you support secession, in principle. "If a group of people within a specific region of a larger state wants independence, it is their sacred right to pursue and achieve it." Something like that. (Or, more eloquently, "[I]n the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them.")
It is tempting to support this principle. Americans honor the words of 1776, which seem to endorse it, 1861-65 notwithstanding. The problem is, things get very complicated, very quickly. "Where does it end?"