I was watching it last night and Kramer was accusing Jerry of being a racist against dentists.
it was something like
Kramer: You know, I heard about that joke you said about dentists, Tim Watley told me.
Jerry: He's just a dentist!
Kramer: Do you know what his people have been through?
Jerry: Dentists?
Kramer: They came to this country just like everyone else, and you don't respect them?
Jerry: He's a dentist!
Kramer: That's how it starts! First a few comments and slurs, and then you start thinking that they should be put in separate schools!
Jerry: Dentists are in differnet schools!
Kramer: See! You're an anti-dentite!
Jerry: I am not an Anti-dentite!
I just though it was ironic, just cause of this, and how Kramer was all like "NO RACISM, ONLY

"