Study released Wednesday by researchers at Duke University and UNC - Chapel Hill . 139 people identified as ` ` Muslim - American terrorism suspects '' since 9/11 . Summarized study involving interviews of more than 100 Muslims in four U.S. communities . Leaders and Muslim-American organizations denounce violent acts , for instance , in messages that have weight within communities . Study : Ideology ` ` that justifies the use of violence for political ends '' is roundly disputed .
Study released Wednesday by researchers at Duke University and UNC - Chapel Hill . 139 people identified as ` ` Muslim - American terrorism suspects '' since 9/11 . Summarized study involving interviews of more than 100 Muslims in four U.S. communities . Study : Ideology ` ` that justifies the use of violence for political ends '' is roundly disputed .