A Sydney man has been charged with allegedly sending a threatening letter to a mosque, which also included threats towards Aboriginal Australians and some politicians. NSW Police arrested the 70-year-old during a raid of a home in Belmore, in Sydney's west, on Saturday night, where officers seized more than 100 letters, stamps, notepads and several electronic devices. It is one of four racial or religious hate-related incidents dealt with by NSW Police in recent days as officers prepare for heightened tensions at competing protests on Australia Day. Police will allege officers were first called to Lakemba Mosque, Australia's largest mosque,...