>>118346347To be absolutely fair, once they stopped being shit and backpedaled, there was really no reason to try to punish them, especially since most of them, especially White, don't even understand concepts like retribution. Furthermore, if their society works like in synapse, killing or shattering them would harm the gem society more than helping it. They are more useful alive and free, and seeking revenge is kind of retarded regardless of the show's moral.
Outside of the gems they shattered, all the corrupted gems went back to normal, and there's no proof that there was organic life in the world they colonized considering organic life was irrelevant for them. And even back at the shattered gems, if you get most pieces and put them together, steven can theoretically restore them, maybe with a lost limb or something like that.
I think the only major crime the diamonds have still to answer to is the cluster since it is irreversible and it's basically the proof of a damn genocide. And, again, even then the cluster is ok as it is and nobody really gives a shit about it anymore.