Yes, go ahead and slaughter the scholarly pregnant women and children because the World Government claims they’re a threat. And this is after God Valley btw, when Sengoku already knew all about the mass genocides they committed for fun.
Never said they were "good". Until they went to shit, they were the definition of "ends justify the means", but the "ends" seemed to be good. Now not only the ends are demonic, but we have genocidal contests for fun lol.
Anyway, Sengoku now knows, as Garp, but thinks he can do better inside the navy than outside it. Not different from Garp, who even said that if Sengoku becomes corrupted, he'll kill him.
Difficult to believe? Absurd? Maybe, yes. It's on Oda because the moment the WG became the playground of demons, good people working under it became absurd.
That's why Oda had to ben backwards to try to justify this nonsense.