Are the Mexican, Russian and Italian Mafias, more organized and better than the CIA, SIS-M16, and DEA?
Your question was have there been any Cosa Nostra, and others organized crime murders or conflicts. In short, the answer is not many. Both groups are generally not running in the same criminal circles, and the reputation of the Italian Mafia is such that they are not ordinarily challenged by these gangs.The American branch of the Mafia generally sticks to behind the scenes ventures, such as phone scams, prostitution, gas tax scams and so on. Gangs focus on guns, narcotics, prostitution and other activities. The difference is that they are not generally as well organized, low profile or security paranoid as the Mafia tends to be. But the organizations are the same.
