There is a pretty interesting article written by Entertainment Weekly's Owen Glieberman. In it, he explains that when he originally reviewed the movie Let the Right One In a year ago or so he panned did. It was a short review given the magazine's length constraints. The reaction to his negative review was hostile. Many people love this film and was incredulous that he would actually go against the majority and pan the film. Well, in this article, he talks about how some films tend to engender reactions that can be divisive since the object of the reaction is loved or hated passionately. He gives a few examples such as Moulin Rouge, Boogie Nights, Natural Born Killers. I would probably add any Lars Von Trier or David Lynch film. His thesis if I am getting it right is great art, art that doesn't conform or isn't homogeneous, causes division, and those that love/ hate it do so passionately. I found a similar situation last year for anyone who said they did not like The Dark Knight. There was just this mass, unreasoned backlash against that person. They took it personally. Glieberman explains he went back to Let the Right One In and re-watched it, to see if he may have missed the boat on this one... and, well you can read the article. But I found it a fascinating take on why some people care so passionately about films and what it means to be against popular opinion...
http://movie-critics.ew.com/2009/10/31/let-the-right-one-in-yes-i-saw-it-again/