Passing the ideological Turing Test integrally (or Schrödinger-style), and in less than 140 characters:

To "secede" means to draw a line, a border. "Open Borders" is anti-secession. It's easy like that.

— Lucia (@libertas143) October 9, 2015

Arguments that work equally well for both sides of an intensely-contested political controversy have to be extremely rare. (There should be a competition, or something.)