Between East Asians, South Asians, Europeans?
I'm sure lots of 2nd generation Asians have suffered from the "ignorancy" of Americans

on our inability to tell the difference between Koreans/Japanese/Chinese etc. and just throwing our hands up in the air and saying "Chinese, Asian same thing!" Same goes for Indians/Pakistanis/Bengals.
On a separate note, does this same issue apply to Europeans? I've never noticed Europeans being heckled about what Germans look or what Belgians look like, but (noticing that there are quite a number of Europeans) is there really a ethnic difference between Europeans countries that you can tell apart? There clearly is a difference between Asians (I have yet to master the difference of Indians), but do Europeans do also?
What about we Americans? Descendants of Europeans, we should look like one or another, or do we just unique due to our previous widespread genetic mixing?
$0.02 for your thoughts