To have the Israelis grasp that Iran and its allies are capable of restoring their deterrence capabilities: That’s the main issue for Tehran’s reaction to the attack that killed Hamas politburo chief Ismail Haniyeh, just a few hours after the Israeli assassination of Hezbollah’s high-ranking commander Fouad Shukur in Beirut’s southern suburbs.But at what cost? On Saturday, Iranian officials reportedly told Arab diplomats that they did not care whether the retaliation triggered a war, the Wall Street Journal quoted sources as saying. The Iranian authorities vowed a response commensurate with the affront, which exposed the security weaknesses of the “Axis of Resistance” network.During the last Iranian-Israeli escalation in April, following an Israeli strike on the Iranian consular annex in Damascus, Tehran’s response was calibrated and...