Imo it's disgusting how some of these gangsters quietly accept their relatives' murders and just go along with it without seeking any revenge, because they are afraid for their skins or even worse, because it "isn't personal, just business". If they gave a sh#t about their family members' deaths, they would have done anything in their power to have their killer's head. Salvie Testa killed his father's killers (with the exception of Casella), but imo only because he had the backup of the higher-ups in the organization. If his father's murder had been sanctioned by other bosses, he would have probably retreated "with his tail between the legs", like Narducci's children.