They're generalizing ignorantly from a very narrow slice of a culture, which they saw because that was the narrow slice in which their own family chose to participate, and proceeding to blame quite literally everyone else possible but themself and their parents for that entirely intentional choice. They have either failed to study sufficient history to find the error, or have done so and found the error preferable. Neither merits my respect.

I don't even care they won't listen to me trying to explain how they're blinkered, because I have been trying for three mortal decades and that literally never works; to somebody like this one, I'll never be anything but poor white trash, no matter just how cleverly they always think they say it.

I grew up poor and white in Mississippi and I didn't grow up hearing slurs. That is white trash behavior - white trash, not poor! - as I was raised to believe from before I myself could speak. Like public drunkenness or indecent exposure, that is, an "unforced error" invariably both culpable and shameful. And here we have this fool who not only did grow up with those who knew no better, they themself is ignorant enough not to know they should have known better, yet believes themself qualified not merely to opine but to condescend. Must I wipe their nose for them as well? Another orifice, perhaps?