You mean like the commies "never allow[ed]" the Soviet Union to collapse and fall apart with astoundingly little violence and bloodshed? You mean like that? (And the American Civil War doesn't "prove" any such thing - it occurred over a century-and-a-half ago, and the principals who prosecuted it are all long dead and gone.)
But in any case, I have already clearly and explicitly accounted for the possibility of such violence in scenario (3):
Also, I notice you
still haven't answered my question.
I won't bother asking it a third time, as I think at this point we all know what the answer is.
I am curious about something else, though: just how do propose to forcibly expel those millions of "the left and their fellow travelers" without engaging in the very "civil war" you say those people need to be expelled in order to avoid or prevent?
Whatever the details of how that might be accomplished - if it is even possible at all - it will require (and if successful, result in) the implementation of scenario (2) - QED. And for what possible purpose? Just so the continued existence of a severely dysfunctional and increasingly authoritarian federal government - one that clearly no longer serves the principles and ideals it was allegedly created to uphold and protect - can be preserved and maintained at its present scale and scope?
Why?