People always talk like a civil war is inevitable here because of our “political divide”, but it’s not. The reactionary elements of the US have all the power that matters here. Even when elements try to make good on their progressive platforms they used to win elections, they show a total inability to meaningfully enforce things. The institutions meant to enforce laws are corrupt and conservative as hell. Pass an unconstitutional law to beat up pro-Gaza supporters, they’ll enforce it in a heartbeat; pass a constitutional law to demilitarize the border and they’ll let state NGs do whatever they want.
The only war that I ever see happening here is if enough rabid reactionaries slip the leash, believe their own hype, and try to take down their paymasters. A Night of the Long Knives, and it’ll end the same way: with the rabid dogs put down by their corporate masters.
The book is very different from the film, especially in tone. The film is pure satire, but the book was quite serious in its anticommunist themes, going so far as using the Arachnids as a metaphor for - specifically - Asian communists. Heinlein thought of Asian communists as virtually mindless, sacrificing themselves for the collective - like bugs.