Original: In the episode, Krusty the Clown reveals to the Simpson family that he is of Jewish heritage, and that his father, Rabbi Hyman Krustofski, disowned him for pursuing a career in comedy.
Simplified: In this episode, Krusty the Clown says to the Simpson family that he is of "Jewish heritage", and that his father, "Rabbi Hyman Krustofski", disowned him for keeping a job in comedy.