by force if necessary .
UN forces did not come to protect Israel. They came to keep peace along common borders. Lebanon peace and security is priority for UN forces rather than Israel.
Google News 1/10/2006
Israel completes pullout from Lebanon
ZARIT, Israel (Reuters) - Israel completed its withdrawal from southern Lebanon on Sunday under a U.N. resolution to end a bloody war with Hizbollah guerrillas, Israeli security sources said.
Israel sent more than 10,000 troops into southern Lebanon during a month-long war triggered by Hizbollah's abduction of two soldiers in a cross-border raid on July 12. Almost all the Israeli forces had been withdrawn in recent weeks.