Never ask someone where they're "really from" after they've already told you where they're from. This almost always has connotations of racism and/or xenophobia, even if you didn't consciously mean it that way.
Say for example you work at an office in Reykjavík. You have a co-worker who has dark hair, skin, and eyes, and you ask her where she's from. She replies she's from Kópavogur (a suburb of Reykjavík). In this situation, it would be rude to follow up with "yes but where are you really from?".
First of all, "where are you really from" needlessly conflates ancestry with where someone is from. If your co-worker was born and raised in Kópavogur, but her mother is Pakistani, then she still is really from Kópavogur. Her mother being Pakistani is a completely separate matter of ancestry. She may have ancestry in Pakistan, but she as an individual was still born and raised in Kópavogur, so is really from Kópavogur.
Second of all, it's never polite to single someone out and treat them differently because of their appearance, especially aspects of their appearance they have no control over (like hair, skin, and eye color). If someone with blond hair, blue eyes, and pale skin can say they're from Kópavogur, and just have that left alone without anyone prying any further, then it's not fair that someone with dark hair, skin, and eyes can't just say "Kópavogur" without it being pried into and questioned.
If you ask one person where they're "really" from and not another, and the matter comes down to appearance; then there is the thinly veiled, and quite racist / xenophobic insinuation that looking a certain way means you can't "really" be from somewhere, even though they were in fact born and raised there.
























