it seemed Hezbollah was helping these people, providing them with food and water. These were some of the [poorest] people in the town, those with money had already left. They were staying in this section of town because there was food and water.
They were the poorest in town, they were staying because of the food and water Hezb'ullah was giving them...
Connect the dots.
I'm also surprised that there were NO SURVIVORS, not one?