Continuity mistake: Peter and Luke Perry go into Peter's house, and sit down. The door is open when they sit down. In the following close-up of Luke Perry, the door is closed, with no evidence of anyone, or anything, closing it.
Continuity mistake: Stewie takes the card from the predictor machine in his left hand but on close up it's in his right hand. (00:04:30)
Continuity mistake: The length of the antennae on the remote control on the back of Chris's head constantly changes between shots.
Continuity mistake: When Stewie is just about to fly into the fan in the Griffin's living room, having just attached the antennae to Chris, a green balloon appears on his back with the other three balloons.
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