Here is the text straight out of the UN report. You can't argue with it because it agrees exactly with what Amnesty Intl and Human Rights Watch also concluded: the Palestinians are war criminals:
"From the facts available, the Mission finds that the rocket and mortars attacks, launched by Palestinian armed groups in Gaza, have caused terror in the affected communities of southern Israel and in Israel as a whole. Furthermore, it is the Mission’s view that the mortars and rockets are uncontrolled and uncontrollable, respectively. This indicates the commission of an indiscriminate attack on the civilian population of southern Israel, a war crime, and may amount to crimes against humanity."