I'm just mystified that you're calling people ignorant on this issue when most understand and know what blackface is. Just because people disagree doesn't mean we're all uneducated. In my opinion, what she did was stupid, but calling her a racist is a stretch, especially when her intents are clear. This is a completely different case than the people dressing up as T. martin for Halloween, for instance, but I'd assume you categorize it as being just as terrible? I'm just saying there's a huge grey area on the "terrible" scale, and although she fucked up, some people can't really understand getting as up in arms over this as other cases of evil, blatant, blackface.
Now if anyone is arguing that blackface doesn't have racist beginnings and connections or is completely OK to do, ever, then they are absolutely ignorant. If that's the case, I apologize.