Magneto

Magneto was the main enemy of the X-Men for many years and a mutant extremist. Early on, he tried to forcibly recruit Jean Grey as part of his mutant army. He recently seemed to have a change of heart and stopped trying to take over the whole world, but established Genosha as a homeland for mutants. Secretly, however, he was still trying to wage war against humans and used the Brotherhood of Mutants to create further agitation between mutants and humans.