As long as it would be individuals or households, yes the Lon Horiuchis would have a bad effect on those few. My contention is that before that got beyond an incident or two my state, Texas, would stand with us and the entire State would be too big for the few Lon Horiuchis to win.
Perhaps you are right. I always consider the dissolution of the Soviet Union when considering these possibilities. The USSR was designed to maintain its existence through multiple layers of redundant armed forces, police and paramilitary organizations. When the crisis arrived, they defected to Yeltsin and the reformers or remained in barracks, while the Soviet Union went to its deserved dissolution.
Our own history has contrary examples, as here:
http://www.wadehamptoncamp.org/hist-p-600.html
We are not at such a juncture yet, and there are many unknowns. The former Soviets were fortunate. The former Yugoslavs were not. I truly wonder which way we would go if it came to such a pass. I do think freedom from centralized tyranny will ultimately prevail. The question is at what cost.