You're defending a guy who brags every chance he gets about murdering several guys. Are we supposed to believe that footage of him is fake?
Let me guess, you support Trump, too? I never would have guessed that so many of my fellow Americans were such authoritarians. I knew there were some, of course, but it looks like they may comprise around 30-35% of our population. Tough times ahead for the liberty-minded...
Look, I get the appeal of Duterte. I'm sure that a large percentage of Filipinos are happy with his behavior. That doesn't mean it's right.
Finally, tu quoque is not a very good verbal defense tactic. Most people disregard it other than the people who already agree with you. Most famous example of this technique is Stalin's use of "and you are lynching negroes" [1]. He wasn't wrong, but that didn't mean he wasn't also carrying out political murders on a massive scale. It's just poor rhetoric.
1. https://en.wikipedia.org/wiki/And_you_are_lynching_Negroes