and that we should worship one god, love and adore the one guy. >> reporter: people who know him say he is a voice of unification. >> his work is well known. >> reporter: the developer of the controversial islamic center near ground zero. >> he is somebody who has sacrificed his life to building bridges within communities. >> reporter: islamic scholar and university professor john esposito. how would you describe him? is he a threat? >> feisal, from my point of view, he is mr. mellow. >> reporter: imam feisal is a muslim. >>' proechs islam spiritually. he is a one pursues, if you will, a more spiritualness mystical path. he finds terrorism and religious