More than six months of Israel’s military offensive in Gaza has turned the Palestinian territory into a “humanitarian hellscape”, UN chief António Guterres said Thursday, also warning that one wrong move could see the Middle East devolve into wider war. World powers have been watching nervously since Israel vowed to respond to Iran’s retaliatory weekend attack on its arch enemy, with fears soaring that escalating tit-for-tat attacks could push the region towards broader conflict. Israel’s top ally and military supplier, the United States, and Britain unveiled sweeping sanctions against Iran’s …