A three-page "essay of condemnation" addressed to a leader of Sydney's Muslim community has sparked renewed fears of escalating threats of violence. It is the fourth letter of its kind received by the Lakemba Mosque in the city's south-west over the past six weeks, with the latest addressing Lebanese Muslim Association secretary Gamel Kheir by name. While it did not contain specific threats of violence as earlier ones had, Mr Kheir told the ABC it was the first time it was "personalised". "It was addressed to me, basically attacking my position and my comments in relation to the rise in...