Before Mohammad Youssduf Adulazeer shot up a military recruiting center in Chattanooga from a car and then sped away, another Mohammed, Abdulhakim Mujahid Muhammad did much the same thing in 2009. Both struck military recruiting centers in the South, but the 2009 Mohammed had a message for Americans that we unfortunately failed to heed. “This is not the first attack, and won’t be the last,” Muhammad warned. “I’m just one Muhammad. There are millions of Muhammads out there. And I hope and pray the next one be more deadlier than Muhammad Atta!” There are millions of Mohammeds out there. It...