Because I’m Asian and I can remember like at least 10 instances where people in the US (Including Both White and Black people) would assume I don’t speak English before I had a chance to talk. I’ve lived in this country since 8, I speak on a native level. I wonder if there is just a subconcious “perpetual foreigner” stereotype engrained into people.
Because I sometimes feel uncomfortable. Like it just feels very awkward after I get asked that, then I speak English perfectly lol.
I am completely unable to tell if someone is not an American citizen or not at glance. I can generally tell if someone is definitely American with high accuracy (mainly based on accent and how they talk), but detecting not an American would have very high false negative rates.