From Family Guy S12E12
Stewie: So, where do they think they go when they die?
Brian: Well, you should try asking the rabbi. Although, I should warn you, you might not get an answer.
(Inside synagogue with rabbi)
Stewie: So, where do Jewish people think they go when they die?
Rabbi: Where do you think we go?
Stewie: Well, I don't know. That's why I'm asking you.
Rabbi: Why do you think you're asking all these questions?
Stewie: I-I just, I just really want to know what happens.
Rabbi: Do you think that's part of God's infinite plan?
Stewie: I think your whole religion is a sham, just so you can get extra holidays off from work.
Rabbi: Oop, gotta go. It's Buchwuch.
I think I get the joke of the last 2 lines, but before that, the rabbi answers Stewie's questions with questions. What's the Jewish or Jewish stereotype joke here? Lots of religious, theological or philosophical professionals do this even if they're atheists or agnostics.
A question on a Christianity joke in The Big Bang Theory: What's up with churches and guitars in this joke from The Big Bang Theory?