Albert del Rosario, the Philippines’ former foreign secretary turned away from Hong Kong last week while using a diplomatic passport, has defended his use of it and says he was singled out because he was a signatory to a “crimes against humanity” international lawsuit against China and its leaders.“It’s clear it was in retaliation for that [legal]action,” he told a morning news programme in the Philippines on Thursday.In March, Del Rosario and former ombudsman Conchita Carpio-Morales sued…