I had a colleague who once went to a restaurant but tried getting in through the wrong door. People at the restaurant asked him if he was there to make a delivery.
“It’s because I’m Mexican!” the colleague ranted. They see a Mexican face and assume I can only come to a fancy restaurant to make a delivery. It doesn’t occur to them I can be a college professor!”
The guy’s “Mexican face” is whiter than mine but leaving that aside, what’s so humiliating about being a delivery person? Nobody gets upset to be mistaken for a doctor. It’s pure snobbery that masquerades as political grievance.