Reel Injun (2009)

This survey of Native Americans as depicted on film and television is both enraging and inspiring which makes it a very useful documentary, Canadian made no less!

The film's opening line is delivered by the host who grew up on a northern Canadian reservation. He describes going to watch movies, usually westerns, in the church basement and cheering for the cowboys as they shot the indians not realizing that they themselves were indians.

IMDB