You can if you want. If your injuries happened in Tikrit in 2003, Baquba in 2005, Baghdad in 2007/08 or Mosul in 2010, there's a pretty good chance I was breathing for you at one point.
And I'll judge anyone, especially a Veteran, who says 19 year olds can't be trusted with firearms.
PTSD is an anxiety issue, not an anger issue.
This isn't the first attack on a recruiting station. ISIS communicates pretty consistently that they're targeting service members and veterans at home and anywhere they aren't armed.