Actually, while we need to wipe out this Jihadi cell, we really need to quit equating "Islam" with Bin Laden's malevolent Wahhabist variety. It's like saying that snake-kissers are typical "Christians", or that John Brown at Potawatomie Creek was a "typical Christian evangelist".
Equating the problem with Islam feeds Bin Laden's cells by playing into his hateful propaganda, which is basically an invitation to universal religious warfare.
That all said, these guys need to be found right away and tried for what they did.
Since the guys that did this obviously like to play by Fallujah rules, perhaps we ought to let them surrender by Fallujah rules, too.
I'm not a Christian (deist actually), but there is a major difference. Mainstream Christianity universally rejects and condemns snake-handlers and the John Browns of the world. By contrast, mainstream Islam supports, through acts of commission and omission, the terrorist acts of Bin Laden, Hamas, etc. In other words, mainstream Islam has de facto endorsed such actions. I'm still waiting for condemnation of terrorist acts by mainstream Muslim leaders that are not qualified by b.s. claims that the root cause of such acts lie at the doorstep of the U.S. and/or Israel.