Very old New Jersey joke:
An elderly Jewish guy and an Asian guy were seated next to each other on a flight out of New York..
J: "I'm Saul Goldberg."
A: "I'm Kim Song."
J: "So, vere you come from?"
A: "Korea."
Long pause, then J: "I just want you to know I don't blame you for bombing Pearl Harbour."
A: "Get your facts straight. Japanese did that."
J: "Japanese, Chinese, Korean, vat's the difference?"
Long pause. A: "Good, then I won't blame you for sinking the Titanic."
J: "Vat are you, meshuggah? An iceberg did that."
A: "Iceberg, Goldberg, Rosenberg, vat's the difference?"