First and foremost I think this “Marine” needs psychological counseling.
Second, no one is calling for a civil war...even though many are cautiously preparing sporadic violence/challenges.
Third, the military cannot be called out to deal with civilians.
Forth, this “Marine” doesn’t seem to bright in regards to the Constitution he has sworn to protect and defend.
Lastly, this “Marine” has no Right to threaten citizens in this manner. NO RIGHT and he should be tracked down by the military authorities.
Forth=fourth...
Try to envision this, Sgt. An A-10 Warthog levels and burns the neighborhood your parents live in and kills another 100 law-abiding Americans in order to kill one or two suspected "rebels." You will never stand next to a civilian again without the fear that he or she may jam an icepick into your ear or eye socket.
If you want to play hypothetical games in order to induce fear you ought to consider the consequences of your hypothetical actions. Think of the results of using superior military firepower on working class neighborhoods in America.
Can I refill your beer and get you something to eat while you consider that, Sgt.?
It's good stuff. I guarantee its quality. ;^)