Tens of thousands of supporters (pictured) - including young children decked out in military uniforms while carrying toy assault rifles (inset right and left) - attended the demonstration in Gaza. The group's leader, Ismail Haniyeh, said in an aggressive speech that the US and Israel have found themselves isolated following President Donald Trump's recognition of Jerusalem as Israel's capital. 'We demand the Islamic world make every Friday a day of anger and revolution in every capital and city until we bring down Trump's decision,' Haniya said. 'We ask churches, the Pope and our Christian brothers to devote their Sunday prayers to Jerusalem,' he added. He also said: 'We will bring down Trump's decision once and for all.' Hamas has called for a new Palestinian uprising against Israel in response to Trump's recognition of a new Israeli capital city.