|Hugh Jackman, Michael Fassbender, and James McAvoy|
Without giving away too much of the plot, DOFP involved having Wolverine go back in time to prevent a very pissed off and determined Mystique from assassinating the scientist who would go on to create the Sentinel machines which were designed to destroy all mutants. But what she could not possibly know is that through her actions, her DNA, her very existence would be used to improve and further develop the Sentinel program which would ensure that program's success in destroying her kind. Prof X and Magneto in the future realize the role they both played in having all mutants be on the rapidly developing and devastating path towards complete extinction.
I think that the primary reason why so many people like the X-Men is because there are times when we all feel like an outsider or different from the others. The X-Men magnifies this feeling by ten because we see laid out right in front of our eyes, the outcome of systematic mistrust and mistreatment of other people and other species, simply because they are different than us. And what is different than the majority tends to cause fear, judgments, anxieties, and persecution in the minds of the weaker people. Just when you thought Magneto was being a selfish ass, even through his dramatic actions and regardless of who gets hurt, he has a point. If only the reality in X-Men could become the reality in our reality, which is, don't judge a person by their appearance and their abilities - the world would be a much happier place.