Foul-mouthed Duterte demonstrated in Beijing he can be the perfect statesman (when he wants to be)

Many international readers were no doubt introduced to Philippines president Rodrigo Duterte through one of his profanity-laced tirades against various international leaders and institutions. Anyone “disrespectful” enough to question his war on drugs (because, say, it involves extrajudicial killings by the thousands) has been subject to the mercurial leader’s quick temper and coarse language. But…