They should get to the Christian areas of Beirut. Those should be defensible and Beirut could always be temporarily occupied if needed. If they are Moslem they could be in some trouble.
The real problem is the restraint that allows the bad guys to kill with impunity and hide within the somewhat (or strongly) sympathetic civilian population. They should all be legitimate targets after warnings to evacuate.
Bill Hemmer with Fox is now in Israel.