Islamist forums are abuzz with a new theory: The designers of the video game Grand Theft Auto IV, they say, were inspired by killing methods developed by al-Qaida. But did the idea for the car bombs and suicide attacks in the game really come from Osama bin Laden? For user "Abd al-Wahhab," it is obvious. It isn't just military men all over the world who are studying the murderous methods employed by the terror group al-Qaida. Rather, designers, developers and graphic artists in the video game world, he argues, have realized that "al-Qaida is a killing school." His theory: The...