from what I heard, Monacello was more pissed at Borgesi for not "having his back" in the dispute with Marty Angelina. The way he tells it, he (Monacello) supported Borgesi for 7 years while borgesi was locked up and instead of Borgesi standing up for him he sent word to Monacello that he (Monacello) was in big trouble for planning to lump up Marty. I guess it all comes down to a sense of betrayal. Sounds goofy but I guess you never know what's going through a guys' mind. That and the fact that uncle Joe had his hands deep in his pockets.