Why should a country be beholden to those from another country with another belief and set of societal beliefs if they don't want to be? Why should a country be forced to allow people into it that may or may not assimilate and mesh with the fabric of their society?
edit: one very minor example of un-meshable beliefs meeting in a rather homogenous country.
http://www.japancrush.com/2014/stori...t-sensoji.html Saudi Wahhabi follower goes around smashing Buddha statues in a Buddhist country because of his belief. If Wahhabi is a religion that will be in constant conflict with my countries beliefs why should i be forced to let Wahhabi followers into my country if i don't want to, by letting them into my country either the person would have to go against his own beliefs or my country would have to change to accommodate him neither of which should be forced on an individual or a country.