I would criticize the costume, yes. Because I can’t imagine that white make-up wouldn’t detract from the whole look she was going for.
I’m a light-skinned black gal, but I would look straight-up bizarre if I whitened my skin. I wouldn’t look like a Caucasian. With my nose and cheekbones, I’d clearly look like a black person with white make-up. IMHO, I’d look strange and “off”. When I see a white person putting on brown make-up, I don’t see someone who resembles a black person. I see a white person with brown make-up. It’s a total distraction for me. It takes me “out” of whatever fantasy they are trying to conjure up.
Personally, I’d be bothered if my imaginary child thought he or she couldn’t be Harry Potter or Wonderwoman or Superman without changing their skin color. I would be quite troubled by that. Being black doesn’t bar someone from being a wizard or a super hero. And I would be bothered that my imaginary child wouldn’t be unable to understand what “essence” or “representation” means.
My fourth grade class put on a stage play about Abigal Adams. I was one of the “town folk” or something generic like that. Didn’t get a single line. But I still got to be on stage in my big “old fashioned” dress, pretending to be a revolutionary American, brown skin and all. If I had told my mother that I couldn’t get into character without “becoming” white, she would have had a fit. And this is the most afro-centric person I know.
I think a mask like that would be stupid too. But then again, I’m not into costumes or cosplay. I don’t particularly want to see other people dressed up either…though I admire people who have fun in off-the-wall, creative ways. A person who puts on a mask doesn’t strike me as someone who is taking their look too seriously or expecting any kind of praise, so I wouldn’t think to judge them. They strike me as being different from the guy who goes to the trouble of dabbing brown make-up all over his face and hands and arms. That guy’s begging for someone to look at and evaluate him. But neither really troubles me.