A couple of things.
Z is known to wear a bomb belt to blow himself up to prevent being captured.
The Jordanians probably had a pretty good idea where he was, but were ambivalent about our presence in Iraq and were unwilling to turn him. Were it to leak out that they burned Zarqawi earlier, it could get uncomfortable for the King. Now that Z Boob has killed Jordanian civilians at a wedding party and threatened the life of King Abdullah, the King has the casus belli he needs to openly cooperate with Central Command. Zarqawi drew first blood. The rest of the Arabs will understand that the King must burn Zarqawi to finally put the Mad Dog to sleep.
The position of Zarqawi as misunderstood Jordanian Pan-Arab patriot has been dealt a fatal blow.
In return, Abdullah will obtain important concessions from the Americans and the Baghdad government.
Be Seeing You,
Chris