If there were a civil war, it would be an awfully short one. It’s only the media that makes individual and disparate groups of leftists blathering seem like some kind of fearsome wave. Without the media puffing them up, “The Squad” or “Black Lives Matter” would sink into obscurity.
The Left is a bunch of scattered, single-issue grievance groups, mostly led by old hippies looking for some kind of last hurrah and young snowflakes taking time out from their video games to protest because it’s “cool.”
If it came to some kind of actual “war,” very few of these keyboard “warriors” would show up, let alone fight.
I remember a passage from a Len Deighton book several years ago. I think the book was “London Match,” which was part of a series of books with the British spy, protagonist Bernard Samson. Anyway, the passage was (and I am paraphrasing): “In the West, the Soviets spray-paint anti-semitic slogans and symbols on synagogues and spread the rumor that it was done by right-wing groups, in order to sway public opinion and votes towards leftists.” It is an old tactic of the left.