A MAN who claimed to be an Australian-based jihadist terrorist and encouraged attacks on local Jews has been exposed as an online troll who is in fact a young Jewish-American. The FBI Joint Terrorism Task Force swooped on Joshua Ryne Goldberg’s Florida home, where the 20-year-old lived with his parents, early Thursday, US time, after a joint investigation with the Australian Federal Police into his online activities supporting Islamic State. Mr Goldberg, under the persona “Australi Witness”, had ... boasted about inspiring the May 3 attacks on the Muhammad Art Exhibit and Contest in Garland, Texas, where two mujahideen were...