It was like fashion killing a boss in the Philly mob,thats why Scarfo had the cure for it,by killing every rising star around him tongue i dunno...i think that it was a power struggle but i think the real question is...why Peter Casella wasnt killed by the commission after the "Chicken Man" hit?

Mongol General: Conan, what is best in life?

Conan: To crush your enemies, see them driven before you, and to hear the lamentations of their women.