I don't think talking about one's nationality is something to get all up in arms about. It's a perfectly legitimate question being we all come from somewhere, as do our ancestors. There are a lot of cultural customs out there that have nothing to do with racism or pink inside or, well you know what I mean.
I have a lot of Indian friends and I know many that can drink no better or worse than I can(refering to the genetic intolorance comment)So I don't know if that is a myth or what. I would say a myth.
My mother's side comes from Germany and Poland, My Father's mother was Norwegian but we don't know who or what my grandfather is, so I have always been curious as to "who I am" on that aspect.
Peace, Rustic