The extremely harsh way in which Israel executed its war on Gaza had one basic goal: deterrence. Although Israel might have partially succeeded in its deterrence strategy, an unexpected result was born during the war: mutual deterrence.
The strong and continuous Palestinian rocket response to the Israeli aggression did not cease until the very last moment before each cease-fire announcement. Israeli expectations that Hamas and the other resistance groups would simply run out of rockets or voluntarily refrain from firing them never materialized. On the last day of the war, Hamas broadened its attacks, using a new, previously unused element in its arsenal. The rockets fired from the Gaza Strip up until that point had not contained warheads. When Israel escalated its bombardments by bringing down 13- and 14-story buildings, the Palestinian fighters notched up their attacks by adding warheads to their rockets.