Want this solved? This is how you do it. You give them a country of their own, which is what all the mucking about in that region is really about. Splice Afghanistan and Pakistan in the middle, and graft this heaven-on-earth for them to play in.
Build a wall along the northern border, tell Pakistan and the ISI it's been real and it's been fun, but it hasn't been real fun, and let them have at it. You also give Iran something to think about at the same time.
Central Asia solved.