It is already happening. The occupiers are punishing Palestinians for their democratic choice in February early this year and preventing those with American or other foreign passports from entering either the West Bank or Gaza. A small sample of the stories   
What kind of nation would impose silly laws like this and prevent the right of movement of any individual into any territory, if not a terrorist nation? What kind of nation have the right to prevent people from entering a territory which is not even related to their own, if not an occupying nation? Why is Israel getting away with such crimes and yet if other nations were to do something similar to this, they will be slapped with all kinds of UN resolutions and world sanctions?