Despite the fact that I know India is in Asia, I don’t think of people from India as Asians.
Incidentally, Israel is also in Asia, but I don’t consider Israelis to be Asian either.
https://www.worldatlas.com/articles/what-continent-is-israel...
The Turkish Straits. Are you referring to the more northern border? I assumed it was the Ural Mountains, but it’s more complicated than that and has an interesting history. https://en.m.wikipedia.org/wiki/Boundaries_between_the_conti...
The Census Bureau determines ethnicity and race within America for legal purposes (including employment)
Asians are people from 'the far east' 'southeast asia' and 'india'
https://www.census.gov/mso/www/training/pdf/race-ethnicity-o...
BY NO MEANS am I defending this, I believe much of our race 'stuff' is indefensibly stupid and unscientific from biological, historical, and sociological perspectives, and the American idea of "Asian" is one of the worst concepts of all.
The census may use different groupings.
My theory is that this comes from restaurant culture. There is 'asian food', e.g. 'stuff with rice' and there is 'indian food', e.g. 'stuff with curry'.
E.g. https://biology.stackexchange.com/questions/53636/online-phy...
SE Asia is "souther" than "South Asia" (which is still in the northern hemisphere)
Not specifying the country really sounds like a diversion most of the time (and it's rare that "Asian" could be an useful generalization).
Historically most Asians in the US were from East Asia and later SEA so the label tends to evoke those groups. Lacking familiarity, it may also be harder for many Americans to easily discriminate (lol?) between East Indians and other non-white/non-Asian groups.
Still there are plenty of people that do include Indians as "Asian" in the US, it's hardly a universal standard to exclude them as a lot of comments here seem to think.
I don't think it's automatically bigotry to refer to people this way. "Western European" and "South American" are less controversial examples.