Iranian leaders hailed Turkish Prime Minister Recep Tayyip Erdogan on Saturday for his spat with Israel over its deadly offensive on Gaza. "The Zionist regime's behaviour is an insult to humanity... I thank Mr Erdogan for his act," President Mahmoud Ahmadinejad said, describing Erdogan's storming off the stage at the World Economic Forum in Davos as a "very valuable act". The Turkish premier walked out of the forum on Thursday saying Israel had committed "barbarian acts" during its war on Gaza war, which killed more than 1,300 Palestinians, a third of them children. Iran is a staunch supporter of the Islamist Hamas movement, which controls the Gaza Strip and does not recognise Israel. Islamist students staged a demonstration outside the Turkish embassy in Tehran, chanting "Erdogan, Erdogan, We support you," and "Death to Israel Death to America," the Fars news agency reported.