If Terrorism is Not a Muslim Threat, What About Muslim Violence?

Picture above: Noor Almaleki was murdered by her Iraqi father in 2009 who ran his car over her in an honor killing. He objected to her living and dressing like an American.
A study (pdf) from Duke University and the University of North Carolina at Chapel Hill maintains that the terrorist threat posed by radical Islam has been greatly exaggerated.
The study captured front page headlines in Arab News and newspapers throughout the Muslim world.
Charles Kurzman, one of the co-authors of the study, maintains that fewer than three dozen murders have been committed by American Muslims on American soil.
What Kurzman fails to take into account are the number of murders committed by non-American Muslims on American soil and the homicides perpetuated by members of the Nation of Islam.
The actual figures show that Islamophobia is a justifiable stance since Muslims have been responsible for the murders of 5,000 Americans in the past fifty years.
This number includes the nearly 3,000 Americans killed on 9/11 and the hundreds of victims of the so-called Zebra killings that took place in the 1970s.