A Jewish president of a mainly Christian land sat down with Muslim soldiers and made a solemn vow as they broke the daily Ramadan fast. “We will return to Crimea,” he said. These were Ukrainian President Volodymyr Zelenskyy’s words as he supped with Crimean Tatars on the peninsula — one that is linked by land and international law to Ukraine but by conquest and an 18-kilometre bridge to Russia.