Near the end of the hit film “Avatar,” the villain snarls at the hero, “How does it feel to betray your own race?” Both men are white - although the hero is inhabiting a blue-skinned, 9-foot (2.75-meter)-tall, long-tailed alien. Strange as it may seem for a film that pits greedy, immoral humans against noble denizens of a faraway moon, “Avatar” is being criticized by a small but vocal group of people who allege it contains racist themes - the white hero once again saving the primitive natives. Since the film opened to widespread critical acclaim three weeks ago, hundreds of blog posts, newspaper articles, tweets and YouTube videos have made claims such as that the film is “a fantasy about race told from the point of view of white people” and reinforces “the white Messiah fable.” The film's writer and director, James Cameron, says the real theme is about respecting others' differences. In the film a white, paralyzed Marine, Jake Sully, is mentally linked to an alien's body and set loose on the planet Pandora. His mission: persuade the mystic, nature-loving Na'vi to make way for humans to mine their land for unobtanium, worth $20 million per kilo back home. Adding to the racial dynamic is that the main Na'vi characters are played by actors of color, led by a Dominican, Zoe Saldana, as the princess. The film also is an obvious metaphor for how European settlers in America wiped out the Indians. Writer/director Cameron, who is white, said in an e-mail to The Associated Press that his film “asks us to open our eyes and truly see others, respecting them even though they are different, in the hope that we may find a way to prevent conflict and live more harmoniously on this world.