You would need numbers to fulfill that prediction that don't exist, and are likely to dwindle even more. The attempted boycotts to Nike or Netflix (or pretty much any boycott proposed by the far right echo chamber groupthinkers) should be a good indicator of the lack of viability of any "civil war".
Remember that standoff by those idiots in Oregon that ended up with some of them in jail, and a dude killed? That's basically the scenario you're looking at. Arguably, that made Oregon even more blue.