Dracula: You messed up, baby. You messed up big time. I told you to take it down. You'll ruin my hotel if they find out.
Jonathan: Well, maybe you're just jealous that people are finally having fun at this place.
Dracula: Oh, that? That was not fun. Everyone running, jumping, swimming with no order. That was the opposite of fun.
Jonathan: Do you even know what fun is?
Dracula: I invented fun.
Jonathan: Boy, the wrong people get to be immortal.
Dracula: [Sees a Twilight movie playing.] This is how we're represented. Unbelievable.
Jonathan: Look at me, I'm a Frankenhomie!
Answer: He simply says that he hates monsters because he's respecting Dracula's wish and placing a barrier between himself and Mavis. He's trying to prevent her falling for him. He says this in the movie: "if I didn't say that your dad would have killed me."
Garlonuss