Because of the recent events i asume that the marvel-universe is going crazy. Why else should Magneto join the X-Men, after all these years full of fights and rival? I know that he and Professor X. are sometimes friends, but what is going on in Magnetos head, that he wants to join a team of mutants who shattered everyone of his plans? And how can the X-Men trust him? I, personally, just started trusting Emma Frost. And if this isn't enough, Doctor Doom is a member of the Future Foundation!
Seriously, what happens next? Norman Osborn and Daken having a dinner with Spidey and Wolverine?
If anyone can give me an explanation for all this, I'd be very thankful.