It was directed at anyone that didn't know the history. You commented that the image meant nothing to you. To Americans, recognize that the image is nearly the same slap in the face as somebody saying the n word. It's an iconic image. If I showed you, or anybody, an image of a circus clown, you'd immediately know what it was, and you'd have certain expectations if someone got on stage dressed as a circus clown. Likewise if I showed you an image of a mime, or a person dressed as a mime got on stage. This blackface image is just as iconic. Would you believe somebody if they said they had never seen a circus clown before, but just happened to dress like a circus clown, got on stage and performed a circus clown act? No, I don't think you would. So, it is hard for us to believe that somebody dressed in blackface, got up on stage, and did a blackface type act, and didn't know what it was. Very,very unlikely.