District 9

I really enjoyed this film. For me, more than a sci-film focused on extraterrestrial's being horrible and mean creatures, this is a movie about human beings and how ugly and violent and prejudiced and greedy they can get when they confront something so different from them that they become so scared that they have to completely destroy it. This could perfectly be a movie about all the terrible episodes of our own history when horrible things are done because differences are not explored and dialogue is never even attempted to understand them. It is also a movie that shows us what happens when completely opposite cultures get in a survival situation that always leads to the kind of abuse and discrimination shown in this movie. All of these is also accomplished through a very realistic style that makes it all more sad and shameful.