000086715 425-1789 [fic] active12thcentury africa antisemitism cairogenizah christianity christianityandantisemitism christianityandotherreligions correspondence egypt ethnicrelations europe france genizah history islamicempire jewishletters jewishlibraries jews judah judaism judeo-arabic juvenilefiction manuscripts medievalandearlymodernperiod middleages north poland publicopinion relations sources to1500