By KARIN LAUB For Israel, the U.N. cease-fire deal is far from perfect. A U.N. force deploying in south Lebanon as part of the truce will have trouble keeping Hezbollah at bay for long or prevent the Iranian-supplied guerrillas from rearming, critics said, pointing to past failures of international peacekeepers. The U.N. terms will buy temporary calm, but make the next war between Israel and Tehran's proxy army inevitable, former Israeli Foreign Minister Silvan Shalom and some military analysts warned. "It begs the question, `What was it all for?'" Shalom said, reflecting a growing chorus of criticism. Israel had little...