Unequilibrium

The saddest, truest thing that I've ever heard about the [Israel-Palestine] conflict is [from] a friend who said that it seems to him like a stable equilibrium.
Megan McArdle. "The problem with Israel-Palestine blogging."

Here's my question - given the fact that Israel generally runs up the casualty score on Palestine by about one hundred to one, and the population of Gaza and the West Bank isn't one hundred times that of Israel... What happens when they run out of Palestinians?