"To generalise that a whole race is better than another is not an acceptable argument is it?"

No, and I didn't do that. However we do have a very long history of white appropriation of aspects of black musical culture; it's effectively what our music industry is built upon. It can be done with various degrees of success, but because of that history, it needs to be attempted with some care and not to mention artistry. Often it can be done very badly. The line between exploitative appropriation and creative fusion is a fine one, as is the line between racist parody and respectful homage. I don't know if Cyrus management wanted to achieve the latter, but my guess is not. I think all they wanted to achieve was a massive boost in publicity for their product through crude (by which I mean blunt/overt) tactics designed to provoke outrage among the parents of the young children watching the show (remember that 'teen' in marketing terms does not align with 'teen' in actual age terms), clearly they succeeded doing that very well.