As a WoC this makes me very uncomfortable.
My own opinions on twerking aren't fully formed. When cases like this arise I look at the cultural history of it, I look at the people who practice and perfect it, I look at the people who are "rich and famous" for it. As a bi woman I try to think of how heteronormativity factors into these discussions. I'm no cultural relativist, but I take all of this into account before I proclaim something feminist or unfeminist or silly or lewd. I'm aware how none of us operates in a vacuum, how my comments could add to slut-shaming or to shaming someone for the culture they're from. I admire them for their skill and take that into account. And then I say something.
I wish other people would do the same.