Dana Priest has gotten hold of the presentation that Nidal Malik Hasan delivered to a group of fellow doctors at the end of his residency at Walter Reed Army Medical Center:
In late June 2007, he stood before his supervisors and about 25 other mental health staff members and lectured on Islam, suicide bombers and threats the military could encounter from Muslims conflicted about fighting in the Muslim countries of Iraq and Afghanistan, according to a copy of the presentation obtained by The Washington Post.
"It's getting harder and harder for Muslims in the service to morally justify being in a military that seems constantly engaged against fellow Muslims," he said in the presentation.
....The title of Hasan's PowerPoint presentation was "The Koranic World View As It Relates to Muslims in the U.S. Military." It consisted of 50 slides. In one slide, Hasan described the presentation's objectives as identifying "what the Koran inculcates in the minds of Muslims and the potential implications this may have for the U.S. military."
....The final page, labeled "Recommendation," contained only one suggestion: "Department of Defense should allow Muslims [sic] Soldiers the option of being released as 'Conscientious objectors' to increase troop morale and decrease adverse events."
Does this make the "terrorist" theory more or less likely than before? I'm not sure. But this, along with other reports, certainly suggests that this stuff had been on his mind for quite a while.