Taliban mobile courts are expanding in Karachi, thus leading to an increased influence of the Taliban in the commerce capital of Pakistan. As local state courts cannot fight corruption, more and more Karachi residents are choosing to bring their complaint to the Taliban. 
Western countries should soon realize a simple truth if they want to really stop Taliban from speading.
And that truth is that Justice is an ideal.
You do not care who provides it to you. You just want it.