As far as the NZ tour goes, none of us will ever know the details. If the government tells a team to get out of the country then they will get out even if the game was taking place in Aus, Eng, or India.
I don't think local law and order will have too much impact on tours. But this good Taliban and bad Taliban, Good terrorist and bad terrorist is simply not acceptable outside Pakistan. Pakistan is yet to realize it or purposely chose to ignore it for various reasons. It won't have a direct impact on tours, but it's guaranteed that the same security threat will be seen differently by visiting parties when it comes to Pakistan. An unfortunate situation as cricket fans, but that's the reality.