manila philippine president rodrigo duterte face international criticism bloody war drug say country will host world summit tackle nations protect human right firebrand leader speak news conference late thursday vietnam asia-pacific economic cooperation meet say summit focus human right violations philippines globally western countries human right group strongly criticize duterte anti-narcotics campaign kill 3,900 suspect drug users peddlers police call self-defense arm suspect resist arrest critics dispute say executions take place zero accountability allegations police reject let summit protect human right human race duterte say shortly meet filipino community vietnam also renew attack unite nations human right expert agnes callamard make death people philippines important rest children world massacre kill ask say victims human right violations welcome attend summit air grievances duterte reiterate threat slap callamard investigate rise death toll war drug would ask make comment victims bomb violence middle east time fascinate drug duterte say duterte also threaten ban two american lawmakers come manila criticize u.s. president donald trump invite visit unite state like like even say without name lawmakers democratic rep. jam mcgovern republican rep. randy hultgren call trump highlight human right situation philippines upcoming visit manila tell presumptuous make think even plan think visit country philippines duterte offer host 'world summit human right