Is it? Last time around, claims about using human shields were investegated by UN and others, and they found that Hamas had not used human shields... Israel on the other hand had - as they've forced children (youths) to go infront of their soldiers when they were clearing areas.
The Genava Convention makes it clear that even though the presense of civilians does not make a legitimate military target immune to attack, it is the agressor's (here Israel) duty to minimize the loss of civilian life and damage to civlian property. Do you really think Israel has honered that duty, when 80-90% of the killed are civilians - almost half children?! This is one of the most heavely populated areas on Earth, and Israel do things like dropping bombs in the middle of residental areas to kill one single police-chief - and ends up killing 10 civilian members of his family in addition... That is not "minimizing the loss of civilian life".
Look at a map. Look at a map of the partition of Palestine the UN suggested... look at area the Zionists declared as Israel... and look at the situation now, with all the illegal settlements on Palestinian land and the illegal blockade! Look at how Israel destroys Palestinan property and life with impunity, and tell me the Palestinans have no reason to resist this agressive occupation by Israel... and then ask yourself, where they should resist, if not where their enemy is killing them and trying to steal their land!