It is an interesting tribal behavior. You'd think we would have overcome this sort of thing in modern times. I am glad to live in CA where everyone is from somewhere else and your origin isn't even a subject. I have fantasies of moving out to the desert some day and settle on a nice ranch for retirement, but then I remember how that felt like, last time I lived in an area with little growth and newcomers. You will ALWAYS get the "you aren't from around here, are you?" and "what church are you going to?" treatment.
I grew up in a small town in Europe where there were "house names" as described above. The house would be named after a long gone ancestor - not the last name of the people living in it. People of one family would live in the same house for hundreds of years. And families of the same nationality that were displaced during WW2 are still treated as "newcomers" even in the 2nd and 3rd generation.
G