I have made the following observation about human society. Xenophobia is deeply rooted in and an unavoidable part of our humanity. It is the opposite side of a coin whose other face is the strong social cohesion with fellow members of our 'tribe' and 'family' that allow us to create complex societies and strong civilizations. If you look carefully at your local community you will see that xenophobia in one form or another occurs absolutely every where and and many levels within society. Here are a few examples in my community and country (Australia): 1) Xenophobia against and stereotyping of Collingwood supporters by supporters of other AFL clubs. 2) Xenophobia of Coles Supermarket employees against Franklins - I once worked for Coles. 3) Strong Xenophobia between members of the Labour and Liberal parties, and between the National Party and the Greens. 4) Xenophobia between Tamil Sri Lankens and other Sri Lankens 5) Xenophobia between American and Australian servicemen during WW2 ("over paid, over sexed and over here") 6) Xenophobia between the management and workers in large companies like Ford Australia and Australia Post. Some of this xenophobia is low level and/or good natured, but it is never the less undeniably xenophobia. I put it to you that the intensity of the xenophobia is proportional to the magnitude of the cultural and ethnic differences between people and inversely proportional to the thresh hold of tolerance towards 'others', i.e. the greater the cultural and ethnic differences the less of them in a host society that will invoke xenophobia. I further put it to you that it is entirely to be expected that large scale Islamic immigration (in particular) is generating such serious and socially destructive xenophobia in the west, and that western governments are being totally irresponsible in assuming that they can allow this sort of immigration and maintain social harmony. Our xenophobic instincts, that all humans possess regardless of race or religion, is a limitation that should be wisely kept in mind by our governments when setting immigration policy. It benefits no one, least of all the immigrants, to allow rifts to develop in our societies through foolish immigration policies born of a naive view of human nature. That is not to say that all immigration should cease across the world, merely that the intake rate needs to be sensitive to this limiting factor or our human nature.