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 . 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 .