In any civil-warish situation, there are likely to be Bad People On Both Sides and perhaps, most of the time, we should just stay the hell out of it, especially as any noninsane person looking at our record of foreign interventions at all levels (from exploding cigars to dropping bombs) would conclude that our record of achieving our stated or even nonstated goals, unless those goals are some version of What's Good For Milo Minderbinder (but even then), has been catastrophic for everyone involved.
We did pretty good post-WWII Europe. For a bit.
