For a quick glimpse of what a civil war in this country anytime in the near future would look like, catch the end of Reservoir Dogs. That would be a good microcosm of the next American Civil War
Yes, it would be a seven-sided hot mess.
Leftist constituencies like blue collar unions and minorities have no love for other aspects of the Left, like gay rights/gay marriage.
Despite the economic compatibility between Libertarians, and the Religious/Social Right, there's no love lost over things like drug policy or prostitution.
I think what the next American Civil War needs is a "bracket system" like the NCAA March Madness. Or maybe something like run-off elections they have in other countries.
The Left squares off against the Right, then the Authoritarians against the Libertarians, and winner takes all? Keynesians vs. the Austrians? Do we form leagues, then have a championship Civil War?