Honestly, if the American Foreign Policy direction, over the last 30+ years, had not been so UN mandated "diplomatic", and we just came out and said we will unequivocally and without any bias or prejudice, bomb anyone back to the stone age if attacked, and any host countries will suffer the consequences for their lack of enforcing International Law regarding Acts Of Terrorism.
The world would gasp, the "diplomatic elite" would call us war mongering radicals, the Un would condemn our remarks, but I'll bet the terrorists "hangin out" in Pakistan, would be rounded up pretty quick.
Maybe it's just wishful thinking on my part, but the result to Kim-Jong-Idiot, Chavez, little man in Iran, and anyone else would be:
How badly do I want to do this and say something stupid?
It's not isolationism, it's a blanket threat to problematic countries, that reminds the world we are still a Superpower, and we will turn 1/2 of Afghanistan into pretty glass beads if attacked.
No invading troops on the ground, no drones, we're talking B-52's and the good ol' silo's on Submarines, and silo's "somewhere" in Kansas....