It's fairly well documented: https://en.wikipedia.org/wiki/Jewish-American_organized_crime https://en.wikipedia.org/wiki/Jewish-American_organized_crim... But

It's fairly well documented: https://en.wikipedia.org/wiki/Jewish-American_organized_crime https://en.wikipedia.org/wiki/Jewish-American_organized_crim... But it really was just another ethnic-based organized crime group, not substantially different from the others in any way, and most definitely not "The mafia that even the mafia is afraid of that you've probably never heard of?"