Complex sentence: Vincent Palermo, Girolamo "Jimmy" Palermo (no relation to Vincent), and Charles Majuri--but Majuri was furious that he wasn't appointed acting boss, and he decided to murder the two Palermos and take effective control of the DeCavalcante family.
Split into simpler sentences: Vincent Palermo, Girolamo "Jimmy" Palermo (no relation to Vincent), and Charles Majuri. However, Majuri, furious that he wasn't appointed acting boss, decided to murder the two Palermos and take effective control of the DeCavalcante family.