From the source:
The United States, following Israel's lead, does not want an immediate ceasefire precisely because that would hand Hizbullah a classic guerrilla-style victory: it started this fight against a much greater military force—and it's still standing. In the context of a region where vast Arab armies have been defeated in days, for a militia to hold out one week, two weeks and more, is seen as heroic. Hizbullah is the aggressor, the underdog and the noble survivor, all at once. "It's that deadly combination of the expectation game, which Hizbullah have won, and the victim game, which they've also won," as my straight-talking friend put it.
Neither U.S. nor Israeli policymakers have taken this dynamic into account. If they had, they'd understand that with each passing day, no matter how many casualties it takes, Hizbullah's political power grows. Several of my worldly Lebanese and Arab friends here in Rome today—people who loathe Hizbullah—understand this problem well. Privately they say that's one of the main reasons they are so horrified at the direction this war has taken: they fear not only that Lebanon will be destroyed, but that Hizbullah will wind up planting its banner atop the mountain of rubble.