Up until I started working, I didn't really encounter that question. When I did start working, people started asking me that question.
Them: Where are you from?
Me: Canada.
Them: Where are your grandparents from?
Me: Canada.
Them: Ok, where are your great grandparents from?
Me: Canada.
It's irritating sometimes. I just want to exist, do my job and go home, like anyone else. Once is ok, twice is odd, three times is weird, and the fourth time is a pattern.
The only accent that I might have would probably be from Newfoundland, Canada, as I grew up with a lot of people from there. I also talk too fast sometimes.
Have you had similar experiences, and if so, how did you handle it? Can fast speech patterns cause this? Why do random people care so much?
He says in another comment that he's a white newfie, so, doubtful, unless he now lives in like, Kolkata. More likely, he has a slight accent or is just upset about small talk.
As a white guy myself, white all kinds of people constantly ask things like "where you from," in the same cadence of "nice weather we're having, huh?" It's a part of getting to know people, what's your name, where you from, what kind of music you into, etc. I don't think they're trying to find out if I am originally of Saxon or Angle stock, I think they're just trying to make small talk.
I would agree with you in when they ask where you’re from. Once they start asking where your parents and grandparents are from they’re trying to figure out your race.
I also agree with you as a white guy I don’t usually get extra probing but there are a few, mostly older, that are trying to figure out what specific type of white. It occasionally ends with a comment about how some group isn’t really white even though they have light skin.
If he's white, as he says, and at least in my experience, nobody is trying to figure out our "race." It's "white" lol, nobody questions it. That and white to white nobody is ashamed to straight up say "what is your ancestry" because no white people (except maybe OP) get offended by it, they always just answer "mostly Irish with a bit of English" or "German, French, English" or "Serbian" or whatever, especially in a "melting pot" country like the US or CAN, so if they wanted to know they'd just ask, between white people that question (regarding ethnic background/ancestry) is as innocuous as "what'd you have for breakfast."
I'm betting he has an accent, and they were asking where he was from but he gave an obviously cold/strange answer, and they didn't know where to go from there. They should have just realized that OP was sort of hostile and doesn't want to talk, and ended it there, yes, but they probably weren't trying to be "racist" to someone who ostensibly is just "a white guy who says aboot, eh."
Idk where you're from, but in America the only people alive when that type of racism was prevalent are ~100yr old. Maybe some old WWII vets still hate the Italians, but mostly, even in my conservative southern location, nobody cares who the "real whites" are. I've even met and argued with actual racists who actually hate POCs and even they still accept all forms of "white," even "white hispanic or latinos."