Perhaps I should say, according to the white house there seems to be many more incidents of work place violence involving international non employees with a grievance.
BO's reasoning for not calling it terrorism could be something as simple as, if he says it's terrorism the insurance policies won't have to pay out under acts of terrorism exclusions in most policies. We all know how much he hates big insurance companies and has worked to undermine them since day one. There's no way if he can help it is he doing anything to give them a way to exclude coverage.