No. Nowhere near civil war. Civil unrest maybe, but not civil war.
I think she is a second rate hack desperately flogging her shitty book with deliberately misleading tweets. She should lose her Professor status and be consigned to ignominy.
Her tweet in the article you linked about how the CIA cannot legally look at political instability within the USA, so they are “blind” to the risks is pure unadulterated bullshit.
The reason the CIA cannot legally investigate political instability within the USA is because that’s the job of the I&A, DIA, TFI and NSA depending on the type of issue. So the USA is not “blind” at all. She knows this, you can’t be on a CIA taskforce and not know they’re not the only intelligence agency in the USA’s IC.
And she’s being ridiculous claiming a civil war = end of democracy. USA was a democracy before, during and after its actual Civil War between Union and Confederacy.