The Joy of Appropriation – Persuasion:

I want to focus here on the kind of case that is now most frequently derided as “problematic”: freely adopting aspects of another culture simply because one values them as crystallizations of human excellence. Cultural appropriation, in this narrower sense, is an unqualified good—and to oppose it is nothing less than anti-human.

It’s mentioned in the article, but if you’ve not seen Morgan Bullock, the African-American teen who’s busied herself “appropriating” Irish dancing, do yourself a favor.