More Workplace Violence?

The Department of Homeland Security has tagged today’s shooting at the Anacostia Navel Yard in Washington, DC as not related to terrorism … see: The Daily Caller Story.  Must this be another case of workplace violence?   As many as three shooters kill twelve people (IDed so far) and it is not terrorism?  Homeland Security people need to x-ray their own bodies with those airport full-body scanners … because they clearly have their heads up their arses.

Update: According to Breitbart, the only shooter so far identified, Aaron Alexis, was a Buddhist ... see: Breitbart Story.  Correct me if I am wrong but aren't Buddhists nonviolent by definition?