But even if it’s bad for the US, the global south would really benefit from a civil war in the US. A temporary benefit, though, as if the reactionary side wins, we can expect the US doubling on war and imperialism, as they wouldn’t have an opposition.

The damage from a civil war would accelerate the decline (if not collapse) of the US, and by extension, its imperialism. Even if the reactionary side “won” such a thing (which would only ever be a temporary victory, as the resulting unresolved contradictions would continue to produce problems), they would have a weakened infrastructure and populace with which to wage imperialism. The perfect storm conditions of post WWII for the US are never coming again. What it still has is the benefits it set in place then and those are in decline.

Not to say we should think things will be easy. Just that I don’t see any outcome in which the US re-assumes, or becomes stronger than, its peak of power. As far as I can tell, the transparent mob boss handling of empire is a desperate attempt to cling on, which is, along with active education efforts from anti-imperialists, helping to unravel decades of divide and conquer propaganda in real-time.