Blue Harvest - S6-E1
Lois Griffin: Aren't you a little fat for a storm trooper?
Chris Griffin: Well, stay here and rot, you stuck-up bitch.
Ship captain: I'm sorry, but I'm afraid I'm going to have to bar you from the aft section of the ship for the rest of the cruise.
Lois Griffin: Oh, we are so sorry. Peter, what the hell did you think you were doing?
Peter Griffin: Lois, it is called the "poop deck." That is why I pooped there.
Ship captain: You're disgusting!
Peter Griffin: And you're misleading.
Answer: Mort is Jewish, and Walt Disney was said to be antisemitic. So it would make sense in a Disney universe all the inhabitants would share his supposed beliefs.
MasterOfAll