"Cultural Appropriation" as an accusation is a concept that makes zero sense. If you do not like the way your culture is being portrayed by people from another culture, that is one thing, but it does not really describe how this term is used, Its use is at best vaguely exclusionary implying some type of ownership of cultural characteristics that other human beings are banned from using or talking about. In that context, first nations are very guilty of the offense having adopted huge swaths of the white man's culture. Of course, I suppose today it is de rigueur to say that in fact they did not adopt or appropriate the culture of the "pale skin" through a process of cultural evolution, but were forced into it as part of a cultural genocide; another heinous characteristic of the white male and their exclusively negative impact on human history.