According to Wikipedia, that slur is really only used in the US and Canada. If you go to the UK and say it, they will hand you a cigarette.

Totally agree on all counts. As a teen when it originally aired I thought it was funny for the reasons you outlined (Trey and Matt’s intent) but yes in 2024 it just isn’t okay anymore (if it ever was at all) and I bet Trey and Matt agree and wouldn’t make that episode today