This is a horrible thing these animals have done, and as others have said, my prayers for all 3 of the murdered mens families.
Now as to the response to it. I am against the nuke em all crowd. I don't think that its appropriate to kill all the sheep, simply to get at the wolves.
Now I'm not entirely rational about this right now myself. So while I hesitate about nuking them, I would at this point be willing to blow up a mosque everytime another hostage is beheaded. Lets start with mosques in falujah, then other cities like it. Moving on to places in Iran. Maybe it is merely my own anger at these animals who do these things, but I am more in favor of blowing up a mosque, every time another hostage is murdered. Since these dirtsacks want to make this about religion, fine, make it about religion. Let all the people know that when innocents are murdered that they lose another holy site.
If that isn't acceptable, and I admit I may think better of it after I've had some time to cool down. Perhaps find the families of these terrorists. Israel has a policy of bulldozing the house of the families of terrorists. Perhaps simply shoot the families of terrorists. Give em a reason to be upset. On second thought maybe my first idea was better.
(4)There would be no hesitation after that. I wouldn't put many of our troops in harm's way either. The people in Falujah would see fireworks like they've never seen before if they didn't turn over the terrorists.
(5) The rest of the Arab world would understand that we mean business.