As for the article itself: my main gripe with it is that he thinks liberals are leftists. But i also think he underestimates the ideological unity that exists in the US government and overestimates the hostility of red states toward a blue federal government and vice versa. In reality the two parties are far more aligned than the partisan theater they put on would have Americans believe. If push comes to shove even the most anti-Biden MAGA politician in the reddest of red states, you know those people who call Democrats "demonrats" and like to act all tough and talk about secession and civil war, will still fall in line behind a Democrat led federal government. There's a lot of empty rhetoric being thrown around as red meat for the base, but in reality they all have a vested interest in preserving the integrity and institutional legitimacy of the state, and that will take precedence over any of the culture war partisan bickering. The US does not have a two party system, it has one party with two faces. Until a real opposing political force coalesces whose material interests stand in contradiction to those of the existing political institutions and establishment that will not change.
Also, i find it funny that the author tries to claim that blue states will have to be subsidized by the red states in the future when as things stand today the exact opposite is happening. Also lots of very unoriginal and boring conservative talking points in this article, a lot of the usual "go woke, go broke" right wing clichees. All in all i'm not impressed and i have seen much better and more realistic predictions for how a civil war in the US could occur and what it would look like.