KUALA LUMPUR — While Philippine citizens disagree with the Duterte administration’s head-in-the-sand response to Chinese aggression in the disputed South China Sea, a substantial number still support his so-called drug war that has claimed thousands of lives. But there are serious public misgivings about the industrial-scale extrajudicial killings that could yet result in President Rodrigo Duterte being charged by international prosecutors. Last week several hundred protesters marked the third anniversary of a landmark international tribunal ruling in favor of the Philippines and against aspects of China’s expansive claims to the South China Sea. The same week survey by local polling outfit Social Weather Stations showed 87 percent backing for the proposition that the Philippines “should assert its right to the islands in the West Philippine Sea (the local name for the South China Sea) as stipulated in the 2016 decision of the Permanent Court of Arbitration (PCA). However President Duterte, who marked three years in office on June 30, has several times referred to an apparent threat by China to go to war should the Philippines assert its claims to the sea based on the court’s ruling, which China refused to recognize.