Explanation Please

Can someone, anyone, please tell me what the Hell is going on in Israel and Gaza? And why I should support or not support the Israeli invasion (incursion) into Gaza? And please, no "we haev to support Israel because of the special relationship between the US and Israel." And also, no "Israel is an aparthaid state." Look, Hamas was sending rockets into Israel, and you can be damn sure that any other country would go haywire if a neighboring country lobbed rockets onto its citizens indicriminately. But Israel seems to have an insatiable appetite for West Bank settlements. And why isn't Israel biting off its nose to spite its face by going into Gaza? I guarantee you that the world reaction will be overwhelmingly anti-Israel. More money will be funelled to Hamas, and any anti-Hamas sentiment in Gaza is officialy dead. Dammit, what is goign on? And what should a rational person do?