I am surprised that there are so few replies to such an important subject:
this is an example of the double-standards, two articles from the same Left-wing Newspaper.
White supremacists urge Thor boycott over casting of black actor as Norse god
http://www.theguardian.com/film/2010...s-boycott-thor
Gods of Egypt posters spark anger with 'whitewashed' cast
http://www.theguardian.com/film/2015...twitter-exodus
Forthcoming fantasy epic Gods of Egypt has run into trouble after a just-released set of character posters have been criticised on Twitter for showcasing a predominantly white cast.
As the original post says; It's bad if a white plays a black and good if a black plays a White