This is not only a terrible American exceptionalism thing to say, but also probably wrong if you look at history of failing states. The Russian emipre was it the brink of collapse before WW1, participation in that war lead to its collapse sooner then it probably would have.

From an outside view much of the world is long since tired of American exceptionalism, and American influence on the rest of the world. For many people the collapse of America would be a preferable option over the status quo. Me personally would prefer no war at all (neither civil nor world). However I would love to see American influence dwindle in favor of a more global solidarity of the workers of the world (including American workers).