My position is more like the following:
Even if we played forward the worst 5-percentile version of the current situation for a decade, it would be importantly disanalogous to the Cultural Revolution. So it’s better to consider a reference class of more similar events: Red Scare 1, Red Scare 2 (McCarthyism), and various of the inquisitions. Possibly also placing a tiny amount of weight on the Cultural Revolution.
Disanalogies with the cultural revolution:
No recent civil wars
Taking place in old democratic societies
Situated within Western culture
No targeted physical violence
State not supporting the violence
etc.
It’s weird that so many people want to analogise the current situation to the cultural revolution—the case of a murderous autocrat, when they could choose McCarthyism (or indeed the first Red Scare), which have the same element of finger-pointing but without the violence. The cultural revolution analogy is clearly way overblown and diminishes the credibility of any claims made.
Moreover, why would one focus on the possibility of a new civil war, when a new cold war seems 1-2 orders of magnitude more likely, and no less important?