I never noticed either until, no joke, the brain celebrated Kwanzaa (Crackzaa) all the while talking about his heritage, and Francine (impoverished, Jewish, female, mega-athlete) went to her relative's bar mitzvah, or bat mitzvah.
Oh, right! I remember now. I think they were just trying to be inclusive to all viewers. That actually confused me. I thought it would be the other way around. I always thought Francine looked more black.
The impoverished part would have to be stretching it. Garbage collectors aren't rich, but they don't make a bad salary.