
It doesn't explain why she would hate Charles to the point of trying to kill him later.
That's why I think of the Brotherhood more as a terrorist group, or like a cult. People will kill their own friends and family in a terrorist group, if they believe they're trying to stop them achieve their "ideals".
Reminds me when I watched "The Baader-Meinhof Complex". Noble ideals and intentions to begin with, but in the end they were just assassins who wouldn't think twice about killing innocents who get in their way.
Am thinking something like this too.Something happens in Cuba that makes Mystique decide to leave Charles, too. I'm thinking, as evidenced by the international theatrical, that the government turns on the X-Men after they've defeated Shaw and they try to exterminate the entire "mutant problem". And that, of course, would only validate Magneto's beliefs, and Mystique would probably agree with him.
Cuba? What did I miss