Since the time of Abraham and the saga with Ismael, Arabs have been conditioned to live under a master-and-slave scenario. Where Isaac approached Abraham as his father (and heir to his blessing), Ishmael (son through his concubine Hagar) knew Abraham as his master. In the same way, Judeo-Christianity sees God through the eyes of Isaac (God as loving Father), and Muslims view Allah through the eyes of Ishmael (as punishing master).
Muslims will eventually submit entirely to whomever exerts the most authority over them. I fully expect Zarqawi to eventually wear down the Arab "street" until they submit to his psychosis. Very dangerous and very VERY important that we bag his ass at some point here.
Unfortunately, with that mentality on the part of the muslims, someone will rise to fill the vacuum when he is gone. Nevertheless, I certainly agree that he needs to go.