Due to recent events in the naruto universe, I believe that many of us have to come the conclusion that has long bewildered us that girls always find a way to complicate things.
In mangas, in animes, in video games, in life. To think that Obito would help Madara because of a girl. Nothing against that. Love is love. But somehow within the deepest parts of my soul I knew that everything that had occured thus far was over a girl. Call it a hunch if you will. Every death, every battle, was in a sense due to the death of girl Obito loved. I guess all is fair in love and war.
Dont get me wrong. I love women. Just find it amusing that the motive behind Obitos "betrayal" was because of girl.