Gen. George Casey, Chief of Staff of the Army, has an order for you: Stop speculating about the Ft. Hood gunman’s religion or what it means that he was Muslim. Gen. Casey says focusing on whether the suspected shooter Maj. Nidal Malik Hasan had Islamic roots actually hurts the U.S. military, as it could “heighten the backlash” against Muslims serving, even as diversity in the military “gives us strength.”