I don't remember where I saw it, but there was a conspiracy-theory type article I was reading which essentially claimed that some act (War Powers Act?) labeled the inhabitants of the US as enemies (argument that the civil war let the federal gov't conquer the States, thereby depriving the state-citizen of any rights)... if that is at all true, then We The People are the invasion, and asserting your rights (or state rights) is rebellion.
Sounds like a conspiracy. What does bother is that the government can decide under various laws what an “enemy combatant” is or who is deemed hostile and warrants detention. It is an open ended decription.