The only, and I mean ONLY way that this will get traction is if the Palestinian government gives Hamas an ultimatum to stop all hostilities, and if they do not do so, crack down hard on them. It has to be initiated from within the Palestinian authorities as preemptive actions by Israel only serves to further entrench the extremists, and gives them additional recruiting propaganda. Israel must still protect itself, obviously, but they have to take a passive role in the internals of Palestine and Gaza.