Throughout the years of playing GTAIV I have always been puzzled by what really goes down in "Pegorino's Pride"
Everything should be coopacetic but sh*t gets ugly,
There are three reasibs why Pavanos want to see Junny dead-
The most valid reason I believe is the sh*t he started between Ancelottis and Albanians by having Anthony "Tony Black" Spalettea killed. Tony Black as I understand was some kind of a peacemaker in the mob and thus a respected dude. Further, miission "Undertaker" usually takes pleace right before "Pegorini's Pride" so I assume it' s some kind of s payback thing.
Second reason why Pavanos wanted to kill Pegorino could have been simply because LC famiilies never tooK Alderney mob swriously abd thought it a joke.
Third reason because Jimmy was f*cking Graue (alternate dialogue 2)-
Fourth reason probably something to do with diamonds