No shack. Israel is carpet bombing Gaza. There is nowhere to hide, nowhere is safe. Not schools, not mosques, not UNRWA, nowhere.They are striking at Hamas, not the civilians. Just because Hamas is using the civilians as shields is not of Israel's doing and as a result is not responsible for what happens to them.
Once the Gazans see how they are being used as pawns, uncaringly manipulated by Hamas, and are finally fed up with the suffering that Hamas brought upon them, there is a chance that they might rise up against their true oppressors. They know full well when Hamas sets up their weapons right in their midst. At some point they will say "enough is enough", hopefully.
Even hospitals
Where would you hide when they do this?