You didn’t.
Meyer Lansky, Gurrah Shapiro, Bugsy Siegel, and Lepke Buchalter used to joke that they were the Kosher Nostra branch of Luciano’s Commission.
If you study the history of the Mafia in the United States, there’s always been a close association between the Italian and Jewish gangsters.
They mutually hated the Irish Mobs.
Especially in Chicago. Besides his Italian lieutenants such as Frank Nitti, Phil D’Andrea, Mops Volpe, et. al, Capone’s financial wizard was Jake “Greasy Thumb” Guzik and one of his transporation and shipping geniuses was Oskar Kullak.
They waged a six-year war with the Irish North Side Mob led first by Deanie O’Bannion and then Bugs Moran....culminating in a garage on Clark St on February 14th, 1929.
And, a book I read about the Jewish mob said that the hitters who dressed up as cops for the St Valentine’s Day Massacre were Jews from Minneapolis’ Purple Gang. And he was “Greasy Thumbs” Guzik becasue none of Capone’s money ever stuck to his fingers.