That Wanda would do it is still up for debate, as far as I'm concerned.

True, though didn't it turn out that it was really Pietro behind it all or something? I avoided House of M for the most part when it came out, only skimmed the last issue, so I'm not sure of all the details other than "Wanda re-wrote reality (again) and made Magneto the Emperor of F*cking Everything for some crazy reason."