Not just a race war, but an all-encompassing civil war. All demographics against one another. White vs. black vs. Hispanic vs. American Indian, etc. Christians vs. Jews vs. Muzzies vs. atheists. Rich vs. poor. Rural vs. urban. Young vs. old. Who knows...maybe even male vs. female. Then the Chicoms, Russkies, Muzzies and Mexicans/Central Americans will sense the time is right, and in they'll come...
OR...we can find our spines/testicles somewhere, get busy, get active, get vocal, get visible, quit hiding, quit shutting up, quit making excuses, quit abiding, and DO SOMETHING!
Scouts Out! Cavalry Ho!
That's likely, but the “lines” get blurred when you take into account that many of those who are identified as “Non-white” are still law abiding citizens and will side with “Whites” who are law abiding citizens who will be more than happy to accept them into their “fold”.
In any case, it will be bloody, savage, unbelievably atrocious and “uncivilized”, but it will determine the direction this country moves towards once the violence begins.