Danish Muslim leaders warned on Saturday, February 4, of grave consequences if copies of the Noble Qur’an were burnt in a rally planned by Danish extremists to protest Muslim anger over cartoons mocking Prophet Muhammad (PBUH). "All hell will break loose, if those extremists burn the Qur’an," Raed Halil, the head of the European Committee for Defending Prophet Muhammad, told IslamOnline.net over the phone from the Danish capital Copenhagen.