Obama, and the Pentagon, and the Military in general refused to categorize the event during the trial of Hasan as "terrorism" because the Military Code of Conduct didn't have a provision for "terrorism" and they would not have been able to get the death penalty they were seeking in a military court.  After they got what they wanted, a process that took six years, they then changed the tune.

http://tucson.com/news/national/terror-act-or-workplace-violence-hasan-trial-raises-sensitive-issue/article_be513c51-a35d-5b4f-b3a0-13654f019ea6.html

Just pointing out that your over simplification of the situation makes analogy fallacious.