Almost related: Have you seen X-Men: First Class? If not you might want to. The movie will give you another chance to explore the theme of forgiveness.
Charles Xavier represents hope and forgiveness. Magneto represents vengeance. Sebastian Shaw–a Nazi–murders Magneto’s mother before his young eyes. Later as an adult Magneto captures Shaw who is also a mutant. Without giving away too much lets just say that Magneto opts for vengeance!