what part of Poland are you from"
This is true, I am aware of this strange habit. I think it is specific to Polish American/Canadian immigrants, who still virtually live in their little villages, where they or their parents came from. It does not annoy me, but it makes me laugh. So when I answer: I was born in X, and then my parents worked in Y, Z and W; and then I studied at P and found my first work there - they are shocked and baffled. So they ask the next question: but surely, you are from somewhere, aren't you? All they want is a nice, warm feeling of belonging to the same group or being of a better group, or whatever.
In the old 1967 comedy "Sami swoi" (Our Folks),
about two families of sworn enemies but who could not live without each other, in the initial scene of the film Pawlak jumps out of resettlement freight wagon at the sight of a cow of his rival Kargul and exclaims: - "why to look for a strange enemy, when we have our own here!"