In a thoughtful discussion about Israeli prosperity, particularly in comparison to neighboring Palestinians, Mr. Romney cited the work of Harvard economic historian David Landes, who had concluded after a lifetime of study that culture was the greatest single factor in explaining a society's successes and failures. "Culture makes all the difference," Mr. Romney said, paraphrasing Mr. Landes. The Palestinian Authority immediately cried "racism," and their complaints were taken as proof that Mr. Romney's diplomatic skills are wanting, as if diplomacy is all about telling countries what they want to hear and offending no one. Does anyone honestly believe that the Palestinians -- half ruled by the murderous terrorists of Hamas, half ruled by the kleptocratic thugs of the Palestinian Authority -- lack cultural impediments to peace and prosperity? Really?