While most of the world agrees that the Israeli response has been over the top and that the suffering of innocent civilians in Gaza (and Israel) must end, they are also aware that this situation began because Hamas fired rockets into Israel. THAT is what directly led to Israel's bombardment and subsequent invasion of Gaza. Hamas bears a decent amount of the responsibility for the current suffering in Gaza.
And PLEASE, everyone, don't start with the whole "suicide bombings are justified" argument...you lose complete credibility and simply demean the very-just Palestinian cause with talk like that. Honestly, if there is one thing that has hurt their effort more, I can't think of it...