But you're welcome, I guess. At least one of us did.
You've kicked this entire thread off with an incredibly telling non sequitur: teenager won't use headphones -> multiculturalism bad. When called out on that leap, you pivoted to abstract questions about norm enforcement while ignoring that the norms actually worked fine in this situation.
You're not interested in debate. You're interested in getting someone to validate your predetermined conclusion about the necessity of a cultural hegemony. Having to acknowledge that norm enforcement wasn't actually broken here is pretty inconvenient for that narrative, isn't it?
Still waiting for you to explain that original leap, but we both know you won't. Because you can't without exposing yourself further. Good day. Thanks for playing.
The fact that the teenager got defensive is indicative of his understanding of societal expectations and norms. Bending and pushing against norms is what teenagers do, and have done since the dawn of time, regardless of their cultural background and regardless of whether they're navigating the norms of a dominant monoculture or those of a multicultural society.
Your question assumes there was some breakdown that needs fixing, but the only 'problem' was mild inconvenience. When did that become evidence of cultural collapse requiring homogeneity to solve?
You still haven't explained why 'teenager won't use headphones' made you think 'multiculturalism is a problem.' For all you know, this story involved two white Christian Scots from the same cultural background. I'll gladly discuss theories about norm enforcement with you once you've explained why you deemed it necessary to inject race and culture into a story that mentioned neither.
I'm not going to entertain your 'just asking questions' routine until you do.