There is an interesting debate going on about a town in NY that is "Muslim Only" And how they do or do not intergrate into the western world.
http://www.crazyamerica.org/pit/61489-muslim-only-town-usa.html
The debate seems to be that Muslims are not doing like others have (Jews, Italians, Germans etc) and intergrated into the US. They seem to isolate themselves in their own little communes and this seems to be a cause of some distaste that they have for the US and we have for them.
By isolating themselves and blocking out outside influance they can continue to breed hatred and isdain for those on the "outside" and those of us who are outsiders we see them as "scarey" a typical human emotion about the unkown.

