The fact that random unstable Muslims keep shaking to bits and going all kamikaze on us is just, you know, one of those things.
"Ahhh...you don't understand. When the media say someone was not a "terrorist" they mean he was not a member of a known terrorist organization carrying out a plot devised by someone else."
That is not the definition of terrorism. You don't have to be part of a known terrorist organization to commit an act of terrorism.
He probably has also recently "discussed converting to Christianity" or believing that "Christians and Jews are really great people."