It may cause them to celebrate, but it would also mean that there is one less terrorist left to try and kill you and I. And over time, others who may even be thinking of joining a terorrist organization or act will begin to have second thoughts knowing that if caught they will be executed.
These terrorists don't give a shit about dying for their cause. Once everyone realizes that we'll be better off dealing with them.
You kill their families and neighbors and then THOSE people will realize that it'd be in their interests to give the terrorists up.
There's no such thing as playing "nicely" and "by rules" here. In a fight you fight to win... no matter what it takes.
