The Lebanese militant group Hezbollah on Thursday rejected the cease-fire proposal agreed upon by Israel and Lebanon after U.S.-led negotiations.  “We are concerned only with a comprehensive cessation of aggression, a cease-fire, and the withdrawal of Israel,” said Naim Qassem , leader of the Iran-backed Shi‘ite Muslim group that was not party to the talks.  The cease-fire was contingent on Hezbollah halting all fire and withdrawing its fighters from parts of southern Lebanon, but Qassem in a written statement read on TV rejected the proposed action as fulfilling “the enemy’s objectives.” The cease-fire statement made no explicit reference to any Israeli withdrawal from the south.…