I have been reading different things about the culture divide in border states in the lead up to the Civil War. Churches splitting into two and such. I agree with you, I think we are living through that period now - the lead up to a Civil War.
I'm not American, obviously, I'm English, but from my limited understanding, things sound very worrying over there😕.
Perhaps The permissiveness of leftist street gangs & crackdown on rightist street gangs strikes me as very similar to Weimar Germany (but with left & right reversed) which would suggest a lead up to revolution
I think a very overlooked aspect in all of written history on revolutions is the opportunism of outsiders who turn the tide I bet it would correlate with 99% of outcomes if someone smarter than me did an analysis