News Busters has the story.
He's right you know. There are these Christians who mass murder innocents, quoting the Bible as authorization for their actions. The FBI has stopped a lot of Christian plots to blow up landmarks in the United States; Christians have fragged soldiers on the battle front, and have shot soldiers at Fort Hood and have flown planes into skyscrapers.
Wait a minute, no, those were all Muslims. My mistake.
Update: the video at this link discusses whether Hasan is mentally ill or a terrorist.