Scott, it hadn't killed nearly as many people as the Horta. And Rojan, who really could have known better, was forgiven and welcomed after killing. The feeders of Vaal avoided retribution, too. And entire stories turned on Kirk's refusal to exact vengeance on the Gorn and the Earps after they had killed. I tend to agree with Bryan about "growing pains," but whatever the reason, it does feel like a philosophical outlier to me. I like a lot of things in the episode--just that ending that disturbs me.