War in that part of the world has always been something you could only win if you were willing to go in big and stay for generations, killing anybody who got out of line and several of their relatives to boot. In the post-Colonial world, and with our four-year Presidential election cycles, and tech-heavy but rifleman-light military, it is structurally impossible for us to fight a successful long war there. We can either go in and blow up everything dangerous then leave, or not go in at all. Everything else becomes more political than military, but ultimately futile.