Giving an enemy a pass is of course unusual for any oc figure, real or fictional but IRL Magliocco got one despite plotting to murder Lucchese, Gambino and Maggadino.
They gave Magliocco a pass because he was already very sick and everybody knew he would die sooner or later. But he was stripped from his position.
Bonanno also got a pass despite the fact that he would live for another 40 something years and despite the fact that after his initial reprieve he jumped back into the war. Even after that he wasn't murdered. So again, mercy is highly unusual but it has happened IRL with non-related people that were trying to kill each other.
That's because Bonanno was on the run and they couldn't get to him. And after years of conflict within the Bonanno family they finally decided to make a deal with him to stop the violence which was bad for business. And Bonanno wasn't just anybody, he was well respected in the underworld for being boss of his family for over 30 years. Bonanno made his bones when Gambino and Lucchese were dating cheerleaders.
"It was between the brothers Kay -- I had nothing to do with it."
