Only because the state asserts their existence with violence.I'm comfortable saying if a foreign nation rolls military vehicles across a border and starts shelling apartment buildings, those buildings' residents have every right to assert their existence with violence.
We certainly have little-to-no say in how the states in which we live behave, but we're all subject to their whims.
I can't say for certain how much my state listens to me specifically, but if they do, I'd tell them their whims should be such that other states can't do the roll-across-border-blow-up-apartments thing. (to anyone, not just me.) Those are good whims. Everyone should be subject to those whims.