Barbarians and savages who are willing to launch attacks into the heart of civilian cities do not listen to reason. Note that I have not named a "side" in this, but I am sure that you will denounce the barbarities of Israel while making excuses for the barbarities of the Palestinians and their foreign terrorist allies. "Collective punishment" as used by Israel doesn't work because the perpetrators are not punished. The leaders of terrorist organizations like the PLO, Hamas, and the rest of those filthy, savage scum are usually quite safe from any acts of reprisal, as are the leaders of Israel. Instead, they all play the sport of using each others' followers as shooting targets.