A top Italian history professor has caused outrage after he claimed that the Roman Empire fell due to the rise of homosexuality.Roberto De Mattei, 63, a devout Roman Catholic, had already raised eyebrows by saying the Japan tsunami was "divine punishment", and now with his latest claim he faces calls to resign."The collapse of the Roman Empire and the arrival of the Barbarians was due to the spread of homosexuality," the Daily Mail quoted the vice-president of Italy's prestigious Centre for National Research as saying in a radio interview."The Roman colony of Carthage was a paradise for homosexuals and they...