Here's a prediction from me based on what I've seen up to now, and I have come to this conclusion, listening to the words the characters actually say, and not what my perception is from the way the show is filmed. Also what I've read on various message boards.
I don't think in the sense of the word that The Others are actually villains. They are only made out as villains from the perspective of the survivors.
I suspect in series 3 we will get the viewpoint from the Others that these survivors who have crash landed on their island are villains. But to the viewers the survivors are the heroes.
I also have my theories on who the mysterious leader who is controlling events is, but that is easy enough to find out if you look hard enough.