The solution is simple:
Yes, I know you may
There is nothing accurate in the Koran. There is nothing scientific in the Koran. For example, there is nothing accurate in believing women are half a man. If you believe this, then you are retarded, or have some serious mental problems. Additionally, there is nothing good in wanting to kill people that want to disagree with you and draw a picture of a person called Muhammad. As you can see from these mild examples, that the belief in Allah is destroying your country and there is a very simplistic answer to this all.
Lastly, yes I know this idea is absurd as the Pakistani Government is run by Muslims. They will never want to get rid of their money and their religion. After all banning Islam would mean they have to give up both supporting extremism and their loyal voting base.