you can't "enforce democracy". the premise is flawed. what they did was set up an authoritarian system that had some characteristics of democracy.

regardless, agrarian muslims that live in the side of mountains don't have the same concepts of governance and human rights that white, urban liberals in boston do. the whole point of democracy is that these kinds of things can't be abstracted to universals, they need to determined on the ground.

http://www.foreignpolicy.com/articles/2013/12/18/too_much_of_a_good_thing