Earlier this month, the Israeli Defense Forces sent jets into the Gaza Strip, surgically targeting Hamas military sites in the coastal enclave. The IDF operation was a response to rocket fire from Gaza toward southern Israel earlier that day — an attack, according to reports, that the IDF suspects was perpetrated by Islamic Jihad. In punishing Hamas, the IDF was reestablishing previous rules of engagement with the terrorist organization: Hamas will have to restrain other terrorist actors in Gaza or pay a price.