This is stupid. The revolutionaries literally know the celestial dragons do the genocide games. And that the marines are well aware of them.
Why do the marines allow this?
Because the WG>the marines.
Why do the marines allow this?
Because the WG>the marines.
It's a concept even Vegapunk repeated to Dragon (about marines).
About the reasons why Marines did not do anything, we have to see how strong is the government and then judge.