I do not get offended if someone asks me where I am from. I see his as a normal course of conversation with new people.

I get very offended if somebody asks me: "Are you from India?" This specially too if an Indian tried to speak in hindi and ask me that !!! I have told to a few people that it offended me. Many have apologized but few have laughed. And you guys can imagine my response to those who laughed.

P.S. I am not Anti-Indian.