Israel said on Tuesday it was intensifying its bombing campaign in Lebanon as two days of airstrikes targeting the Shiite Hezbollah militia sent the death toll above 550 and forced tens of thousands of people from their homes. The dead included Hezbollah’s rocket chief and two UN aid agency employees. “We must not let Hezbollah rest. We must continue with all our strength,” the Israeli chief of staff, General Herzi Halevi, said, according to military sources. The attacks are to be intensified and more military forces will be deployed, he said. The Israeli Air Force said it had struck “Hezbolla…