There’s an expression in English,”Cutting off the nose to spite the face” which refers to a person’s self-destructive action as he hits back at someone he thinks had done him wrong but his needless action actually hurts him more than the object of his anger.
That appears to be what President Duterte is doing against U.S. President Obama after his disastrous performance at the 2016 Asean summit in Vientiane Laos last week.
That sad thing about it is that, it is not himself that he is hurting but the country. And it was he who unnecessarily caused this series of snubs with his tirade against Obama in answer to a hypothetical question in a pre-departure for Asean summit press conference.