Why is almost everyone who is not Italian a Jew?

Watching movies made by Martin Scorsese, Casino and Goodfellas I can't help but notice that almost everyone of any significance that is not an Italian is a Jew or Jewish.

I mean even degrading comments involve Jews. Admittedly, I don't know much about Jewish people or the religion.

Here are just a few scenes as to what I am talking about.

casino goodfellas

Best Answer

I think you are wrong in your perception:

Ace Rothstein is the only Jewish main character in Casino.
Karen Hill is the only Jewish main character in Goodfellas.

I don't remember these movies having that much Jewish characters. Other non Italian-American main characters of these two movies are Irish descent, or simply undescribed American characters.

Now about insults and degrading comments, this is a common trope in gangster movies where each gangster community (Irish, Russian, Jewish, Italian, American etc...) insults other ones with racist prejudices.