...by hiding out among them and taking cover behind people's houses and schools and other "soft" targets, in the hopes that Israel won't fire upon them for fear of injuring civilians.

"An Israeli military statement said it received intelligence that the dead at the girls school included Hamas operatives, among them members of a rocket-launching squad. It identified two of them as Imad Abu Askar and Hassan Abu Askar.
Two residents who spoke to an AP reporter by phone said the two brothers were known to be low-level Hamas militants. They said a group of militants — one of them said four — were firing mortar shells from near the school.
An Israeli shell targeted the men, but missed and they fled, the witnesses said. Then another three shells landed nearby, exploding among civilians, they said, refusing to allow their names to be published because they feared for their safety."

(Taken from an AP article online today:
http://news.yahoo.com/s/ap/20090107/ap_on_re_mi_ea/ml_israel_palestinians)

The people killed when the UN school got bombed were most likely casualties of this repugnant Hamas tactic.

How can people be livid at Israel, when Hamas, the elected government of the Palestinians, doesn't even respect the lives of its own citizens enough to not use them as human shields?

God willing, the peace initiatives being offered up by Franch and Egypt will lead to an end of this conflict.