I think it would start here with radicalized Mexican-Americans.
You weren't in our rural town just before the Prop 187 vote to cut benefits to illegals back in the early '90's.
There was a big march through our small town with a lot of young Mexican-Americans screaming and shaking clenched fists and roughing up some motorists and cars.
And then a bunch of American voters were so shocked they went out and voted for the proposition...which a shopped liberal judge threw out.
The liberal teachers radicalize them. MECHA/MAPPA (? not sure) funds them going to college and radicalizes them more, where "ethnic studies" keeps up the process.
Have you heard their stuff about "Aztecland" and taking it back and killing all us Anglos?
The Aztecs were actually a very vicious and evil and brutal people who conquered the inhabitants of Mexico not long before the Spanish conquistadors arrived, who were also vicious. And the recent governments of Mexico have also been vicious toward native tribe members in Mexico.
They don't have a lot of good role models from their culture, these young Mexican Americans, as far as I can tell.
Like I said, I discount none of that as possible. I merely suggest it is far more likely that a civil war will erupt in this country due to the abuses of our system visited upon us by so-called representatives who bow to money and power rather than the interests of the nation. People are fed up. There is a culture and class war going on now while the Rich Corporations are acting as a defacto collective monarch using our politicians as pawns and spokesmen for what the corporations want while attempting to flood us in psychobabble to keep us from acting.
I would note specifically that when US citizens are thrown out of their jobs because business won't pay US wages while demanding US profits, we are told it is because Americans don't want those jobs. A blatent, foul lie on it's face and seen right through by people; but, the reps thought they could get by with it. From all appearances, they have gotten the message for the moment. We'll see how serious they are about cleaning up their act.