Ismail Haniyeh, the high-profile political leader of Hamas, has been assassinated in Tehran. Haniyeh, a pivotal figure in hostage negotiations and the most senior Hamas official operating outside Gaza, was reportedly struck by an “airborne projectile” last night. The Iranian establishment was quick to point the finger at the ‘Zionists,’ with state media openly implicating Israel and a senior member of the Revolutionary Guard labelling the killing a declaration of war on Iran. Though Russia and Turkey have condemned the assassination, saying it will escalate tensions, Lloyd Austin, the US defence secretary, said that wider war is “not inevitable”…