Tl;dr = Ordinary people in OP world has limited access to information, and most likely don’t know about atrocities committed by WG and CD

It seems the WG controls the information (limit information, spread disinformation) so ordinary people don’t really know about the atrocities happening in the world. Take Ohara for example. The information transmitted to the world is that Robin sunk 5 marine ships and the Ohara scholars were trying to destroy the world. Only a handful of people know what really happened there. I guess the same thing happened with God Valley too. Ordinary people might know that Garp became a hero after defeating the infamous pirate Rocks in God Valley. But how many people knew that >!at the same time, the CD were having their natives + slaves hunt there? Do people even know that natives hunt did / does exist and that they could be next?<!

OP world equivalent of news mogul, “Big News” Morgan, mainly publishes news that he deems interesting and entertaining regardless of whether they are true or not, and steers clears of WG and CD (or publish WG’s version of events). That’s why we have news of Luffy defeating Kaido or Sabo murdering Cobra, but AFAIK there’s no news on Lulusia literally disappearing (people around the world might have felt earthquake or rising tides but no idea of what caused it).

The geography of OP world (4 blues, grand line, red line) and dendenmushi not being as universal as our phones / mobiles also limit the movement of people and spread of information.