My grandfather was from a European country, my father is British and we have my grandfather's foreign surname.
I was born here, my Mum is British. I was asked at work by somewhere where I was from. I told her the local area, and she said, "No, where are you really from?"
Then someone at work asked me what wedding traditions were "In your country." I was like, I'm from the UK...
Just slightly ignorant perhaps if not necessarily ill-meaning?