Isn't it fascinating that people judge accents harshly? After all, if we can understand one another, what's the problem?
The problem is social stratification within a power structure. Here's a related BBC article from earlier this year.
However, as a kid, I had a similar experience in a completely different country when we moved cities. My accent wasn't "posh" or "higher class" in any way, it was just from a different region. Kids would give me a hard time for it. But the exact same would happen in reverse form in the other region.
Guess people just don't like "outsiders".
I grew up in France, from white parents, classical music professionals, catholic practicing. With what I now recognize as a posh french accent, that they consciously learned as a way to climb the social ladder.
I went to the town school where 80% of the students were descendent of North African immigrants, mostly from Algeria.
Most of those kids lived in projects city, and part of their identity is a specific accent differentiating them from the outside of the project city. This accent is not really related to Arabic; it is distinctively different; with what I can only describe as a palpable aggressivity in tone.
I ended up under police protection after a few broken limbs.
This was more than 25y ago. Sometimes I wonder what those kids have become. If they sometimes regret.
As recently as a couple years ago, a white posh accent kid at the same school got bullied and almost suffocated to death with a fire extinguisher. By the next generation of those immigrants.
I am now an immigrant in the Bay Area. Nobody cares about my accent here ;)
Ah, the Colonial power structure. A gift that keeps on giving. But tribalism runs deep too.
> in the Bay Area. Nobody cares about my accent here
For the most part in the modern US, money=caste. Tribalism still runs deep (see: US politics) but how people pronounce isn't such a factor as it can be in the EU and in the UK.
As you are probably aware, French in Canada is also a many-caste system.
The accent is just being used a heuristic of where you're from, which is the actual judgement. Posh = not from round here.
Northerners are famously insular and protective of their communities (I love them for it but I think it can go a bit far sometimes)
Perhaps the best example of that is that, as one of the linked maps [0] says, both British people who rhyme "scone" with "gone" and those who rhyme it with "alone" think that the other pronunciation is the "posh" one.
[0]https://starkeycomics.com/2024/05/10/eight-british-and-irish...
Two populations in close proximity separated by social differences will develop accents and use those accents to differentiate themselves. It's not a bug, it's a feature.