There has been quite a lot of discussion in the media about "radical Islam" as if to suggest that radical persuasions are unique to Islam. The truth is that virtually every religion has its radical elements. Whenever you combine fervor with hatred, the religion or the group becomes radical in its beliefs.
The southern United States has elements of radical Christianity, while many parts of Israel have elements of radical Judaism. The only practice of religion that can peacefully coexist with others is one that is entirely based on love.