Are the Jewish mobsters referenced in 'The Irishman' real?

Jewish-American organized crime - Wikipedia

TIL that the depictions of the mafia in The Sopranos were so accurate, that real members thought that they were being spied on. These conversations were overheard, when the FBI were indeed

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Robert De Niro The Times of Israel

Al Pacino The Times of Israel

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Are the Jewish mobsters referenced in 'The Irishman' real

Are the Jewish mobsters referenced in 'The Irishman' real?

Are the Jewish mobsters referenced in 'The Irishman' real? - Alberta Jewish News