The article calls out fake profile pictures on facebook as some indication of an artificial message. This is wrong - many people on facebook use fake profile pictures. I use a fake profile picture myself, although my account is genuine. Probably a third of your facebook friend list uses fake profile pictures - go check for yourself. The article also says they have collected a database of facebook accounts that post pro-Duterte messages as if this is somehow an indictment. With Duterte having an 80%+ approval rating across 100mil people population, many of whom have Facebook accounts, do you think a database of 2mil posters is somehow unexpected or fake?
From my time in the Philippines, everyone on the street supports Duterte because he's given them a sense of safety again. For many in western countries, this kind of feeling is unknown because you've likely never walked the streets expecting to be killed at any moment - you have working police and institutions that keep you safe. For many years, the Philippines did not have this, and they see Duterte as having helped make them safe. This breeds an almost fanatical devotion for obvious reasons, and most Phillipinos on social media will defend him with ferocity. The article tries to associate this as something bad and fake. But it's not, it's real and genuine. You can open up Twitter right now and go to Trump's feed and you will see people who hate him and many who wish violence on him. That doesn't mean those people are fake - and the people supporting Duterte aren't fake either.
Here's a quick video on how regular people in the Philippines feel about articles like this one: https://youtu.be/siAjsu0ZmKE?t=429