This is somewhat xenophobic.
So what if it is. In truth Xenophobia is quite common and doing quite well all over the world. Without the basic separation of people provided by Xenophobia no unique culture can develop. Without Xenophobia it would all be just one great big mass of humanity. Which it obviously isnt.
Races and culture develop and people have an inherit desire to associate with people of the same race and culture. To claim that we are all "xenophobic" cause we dont want to associate with other races and cultures is counter to peoples basic desires. Which is to associate with those that are quite like themselves. Christians like to hang out with Christians. Jews like to hang out with Jews. Stuff like that.
In the real world WASP's don't want to hang out with Arabs. White's and Black's dont mix all that well. Americans and East Indians will never coexist in close quarters with conflicts. A strong border wall with a highly restrictive immigration policy is the best way to prevent conflicts.