Current domestic issues have nothing to do with the Civil War. There is no state-like military complex ready to secede. There is no geographic division that lends itself to secession. Etc. etc. The only reason this is invoked is because it's the only meme that most people are aware of, not because it's even remotely accurate. Even something like the 90s Balkan Wars is so far from the contemporary American situation, it's absurd to compare it.

The only thing that's truly new is the media's profit motive for creating a perception of chaos.

Of course, the fact that things have worked out in the past doesn't mean they will always work out in the future. But people who compare contemporary America to the Fall of the Roman Empire or the American Civil War really don't know much about either.