Supporters of former president Rodrigo Duterte gather outside Villamor Airbase, where Duterte was taken following his arrest on an International Criminal Court warrant. Photograph: Getty Images As Philippine president, Rodrigo Duterte was notorious for his boasting. With cowboyish bravado, he bragged about a past when he cruised around on his motorbike looking for suspected criminals to kill, or at age 16 stabbed someone to death. In 2016 he joked about missing out on the chance to rape an Australian missionary before she was murdered in jail in 1989. Just months after he was elected president of the Philippines in 2016,...