[chrismorgan]

It seems to be very popular in the US to take offence on behalf of others. For example: one hears of US people getting upset about “cultural appropriation” on behalf of others, when said others are actually actively happy about their culture being shown and appreciated. You can definitely take things too far in either direction.

[tadfisher]

There's a concept called "allyship", part of which means listening to marginalized people expressing negative reactions to certain popular demeaning acts and acting on their behalf to stop those acts.

In recent memory, you see this in response to last decade's trend of white people wearing Native American headdresses (particular to certain remaining groups of indigenous people in North America) at fashion shows and public events. This was practically the definition of cultural appropriation; in the cultures which display headdresses, one must earn the right to do so, and here you had the descendants of those who committed actual genocide wearing these symbols without even an attempt to understand their significance.

This is in a country that not only practiced genocide, it stole the children of native peoples, ostensibly to educate them to European norms, to cut them off from their hereditary culture; including their language and clothing. It's also a country that continues to ignore its own treaties with indigenous nations and erase their history through "termination" (the policy of un-recognizing individual tribes to eliminate their status).

So maybe it's popular here because this country is particularly terrible at appropriating culture. There's a ton of nuance you might miss if you don't live here and talk to people.