@Museek There are passages in the New Testament that call for believers to keep themselves aloof from worldly governments. Not to oppose them actively, much less violently, but to engage with them as little as possible. That was a very sensible outlook for a 1st-century cult that didn't go along with deifying the emperor.
JW's don't salute the flag either, and I'm with them on that. I disagree with them on basically everything, but we find common ground in loathing idolatry.