Yiddish is not a “Jewish accent”, it is a European dialect.
Spelling grew up in Dallas, and he did not have a pronounced accent of any kind. His English was very good, in fact, and, as the creator of over one hundred TV shows, good communication skills would garner respect, the very subject of the thread.
If you want to make the case that the girls in the LA suburbs were speaking in the accents of their immigrant grandfathers, or if you’re trying to inflict some anti-Semitic bigotry here, it is just not selling.
In what way is it anti-Semitic or bigoted to be aware of or comment about the accents of an ethnic group? And the Yiddish intonation in English IS a Jewish accent because only Jews speak Yiddish.