Hamas and similar groups have a LONG and "proud" history of using hospitals, schools, and other non-combatant facilities as shields for combat operations, and then screaming and crying and finger pointing when something does actually happen.
Do I know that was the case here? No.
Do I suspect it to have been the case? Yes.
Would Israel have been, by the rules of war, allowed to strike the hospital if they knew for a fact it was being used for military operations? Yes.
Once again, though, I have a REALLY hard time ginning up much pity at all.