Well, for the record, I do think that both the Straw Hat and Whitebeard crew should have killed all genuinely dangerous mass-murdering tyrannical psychopaths, rather than give them a slap on the wrist, so they could continue to murder, violate, and enslave innocent people. I am extremely for freedom, compassion, love, kindness, truth, freedom, equality, and all positive values towards nice or decent people, as well as ones that can be redeemed, but letting genuine satanic evil run amok in either any fictional world or our own is insanely stupid and disastrous for all of the resulting good or decent regular people who end up as victims.
The western superhero genre has no choice but to have an extreme double-standard of superheroes systematically killing off completely outmatched powerless mooks en masse while as good as always letting any brand name genuinely dangerous and casually genocidal tyrannical supremacist supervillains continue with their atrocities forever, with nothing ever getting better in the settings as a whole, which remain nearly completely hopeless, morbid, and dystopian, since the stories would very quickly run out of opponents otherwise, and said stories are just intended to continue and continue, but I do not think that it is a good policy statement to set in general.
All of the psychopathic absolutely entitled, greedy, power-mad, and conscience-deprived supremacist tyrants, slavers (including any people helping to run Nazi-level gulags), remorseless degradation serial-rapists and human traffickers, heavy "gradually drive insane and torture innocent people to death for personal profit" drugrunners, arsonists who have burned billions of innocent animals to death via forest fires, war criminals, gleefully torturing thrill-killing degradation mass-murderers, geneva convention-violating bioweapons researchers, and their willing enthusiastic enforcers (including deliberately lying and calculated brainwashing hate-demagogues) who have systematically enslaved and brought the entire human civilisation to the point of extinction with no regard whatsoever for any of their innocent victims, deserve to be completely wiped from existence after first being subjected to the sum totality of all the suffering from every single one of their victims. Burn them all in Hell until their souls are completely destroyed so the enormously larger reasonably decent part of humanity and all of the nice animals can finally be free, safe, prosperous, and happy, and we won't go completely extinct as a species, as far as I am concerned.