The Palestinian president said Friday that the Arab world had erred in rejecting the United Nations’ 1947 plan to partition Palestine into a Palestinian and a Jewish state. The Palestinian and Arab refusal set off widespread fighting, then Arab militaries attacked Israel after it declared independence the following year, a war the Arab states lost. “It was our mistake,” the Palestinian president, Mahmoud Abbas, above, said in a rare interview on Israeli television. “It was an Arab mistake as a whole.” Referring to Israel, he added, “But do they punish us for this mistake for 64 years?”