In this new game, both sides seek the destruction of the other, but neither has the power to achieve it. They are engaged in a struggle that has no near-term practical end. The extremists’ goal is to kill as many Jews as possible and wait for God (or Iran) to kill the rest. Israel’s goal is to restrain the brazenness of the extremists until their movement somehow burns itself out or is destroyed from within Arab society. Israel’s realistic immediate goal is not to achieve some permanent resolution, but to merely suppress terrorism week by week and month by month.
...

In one scenario, Israel finishes a quick ground assault with a lightning effort to clean out the tunnels in the Philadelphia Corridor. Then it withdraws from Gaza, at a time of its own choosing, to let the psychological reverberations begin. In another scenario, Israel’s assault drags on. The suffering of the innocents in Gaza magnifies. The meaning changes.

The architects of the first scenario understand the rules of the new game. The architects of the second miss the core concept: psychology matters most.