One of the "features" of Islam is the lack of any formal hierarchy to enforce compliance with religious interpretation. This raises a fundamental question: Who defines Islam? Is it what a majority of Muslims believe? Is it a "strict constructionist" view of the Koran? Is it cherry-picking certain tenets of Islamic thought?

The answer is yes to all of those and more. So, who can say what is a legitimate interpretation and what isn't? That's up to individual Muslims and the best thing we can do as non-Muslims is to stay out of interpretive disputes.