I agree with most of what's been posted except I don't think Ms. Shurtz made a mistake. The error is on the part of those expressing "outrage"(a grossly overused word today). In my opinion, they're reacting to something that didn't exist at the time Ms. Shurtz donned the black face and the white robe. I consider this a form of insanity; reacting in the present to something similar that happened in the past.
Had she acted in a way that stereotyped blacks as others have in the past, who donned black face in theatrics, for instance, that would have been cause for public and professional outcry.