Midge Maisel, besides her involvement in the very Jewish comedy circuit, is embodying the mostly-forgotten archetype of "the Jewish Princess." Upper middle class to upper class, materialistic and pop-culture savvy, not especially interested in ethnic or religious tradition or history beyond a superficial level, somewhat apolitical, thoroughly Americanized and "white" despite her parents being much more entrenched in a lived traditional Jewish experience.

Remember that it's been over a century since the Jewish diaspora hit America in its biggest wave, and nearly a hundred years since the Holocaust. Jewish culture in America has become extremely secularized and mainstreamed, so the notion of "Jewish girl behaving like a white girl" doesn't really hold water anymore as a character archetype. But you get a lot of Jewish Princess jokes in the earlier works of Mel Brooks, Allan Sherman, Neil Simon (whose distinctive style is aped STRONGLY by Mrs. Maisel), etc.