A friend of mine pointed me towards this article:
When Will White People Stop Making Movies Like Avatar The money quote:
"Think of it this way. Avatar is a fantasy about ceasing to be white, giving up the old human meatsack to join the blue people, but never losing white privilege....When whites fantasize about becoming other races, it's only fun if they can blithely ignore the fundamental experience of being an oppressed racial group. Which is that you are oppressed, and nobody will let you be a leader of anything."