Al-Qaida No. 2 Insults Obama w/Racist Epithet

Item: Al-Qaida No. 2 insults Obama in new message: Zawahiri uses derogatory term to imply president-elect does bidding of whites /Associated Press

More Info: Al-Zawahri also called Obama—along with secretaries of state Colin Powell and Condoleezza Rice—”house negroes.” Speaking in Arabic, al-Zawahri uses the term “abeed al-beit,” which literally translates as “house slaves.” But al-Qaida supplied English subtitles of his speech that included the translation as “house negroes.”

Question: Should the U.S. respond in some way to this insult?