This is not a good analogy, since Marcello was in charge of the entire SE section of the country, including New Orleans and Dallas. Schultz was not, which is why he had to request that the hit be done.
Marcello didn't need anyone's permission.
Look, there is no need to post all these lengthy stories. I will stipulate that it was not the mob's usual policy to kill prominent members of govt. But this case was much different.
Consider the fact that Robert Blakey, who is recognized as one of the nation's top experts on organized crime, disagrees with you and in his book on the assassination, concluded that Marcello was behind the assassination. Blakey's background (Wikipedia):
In 1960, after law school, Blakey joined the United States Department of Justice under its Honor Program, and he became a Special Attorney in the Organized Crime and Racketeering Section of the Criminal Division of the Department. After Robert F. Kennedy became Attorney General, the Department began a major effort to bring criminal prosecutions against organized crime members, corrupt political figures, and faithless union officials. The Section assigned Blakey to the effort.[6] He remained at Justice until 1964, leaving the summer after the November 1963 assassination of John F. Kennedy.[1]
Subsequently, numerous states passed racketeering legislation with Blakey's assistance modeled on the federal statute. In addition, under the close supervision of McClellan, Blakey also drafted Title III on wiretapping of the Omnibus Crime Control and Safe Streets Act of 1968. Numerous states, too, have wiretapping legislation modeled on the federal statute, and Blakey aided in those efforts.
I'm thinking that this guy probably knows a bit more about Marcello and the mob, than you and I.
Also consider that the mob had safeguards, one of which was J. Edgar Hoover. Many investigators believe and there is compelling evidence that Hoover was gay and that the mob had photos which would destroy his career if they were made public. That notion is corroborated by Hoover's outrageous statements, denying that the mafia even existed, and the absence of any serious attempt by the FBI, to bring down the mob or its leaders, like Bobby did.
Another, is the compelling argument by Lamar Waldron that the mob knew that in 1963, General Juan Almeida, the third ranking member of the Cuban Council of State, had provided information to the CIA, in support of their attempts to assassinate Castro, and could have exposed him if the govt. came after them. Waldron discusses that in this interview:
https://www.youtube.com/watch?v=TAdEBzQYj0A
and this,
https://www.youtube.com/watch?v=exXDcu-yRiw
They probably didn't.
Interesting, so who was it that put a circle of bullet holes around his mouth, 5 days before he was to testify before the Church committee?
That was the same Traffiicante who was BFF with Marcello and told Frank Ragano that he and Marcello were behind the assassination. What a coincidence, eh
And what evidence is it that convinced "most investigators" to believe that? Funny, isn't it, that they waited until 5 days prior to Giancana testifying.
I don't see how those speculations are relevant to anything.
I don't see any relevance to anything here. This is all speculation.
Of course there are. But think about the timing of these murders, which occurred just days after talking publicly about the mob's role in the assassination or a few days prior - Giancana 5 days prior, Nicoletti within 24 hours of the HSCA calling mob figures to locate him, Ferrie almost immediately following the announcement that he was being investigated on the JFK case. Roselli, within a month, after telling the Washington Post that the mob ordered Ruby to kill Oswald.
I'm not sure how to calculate the probability of all that being a coincidence, but I doubt that an 8 digit calculator would be sufficient