Islamic antisemitism is as old as Islam itself, and is not a mere borrowing from non-Muslim sources, as has been claimed. The Legacy of Islamic Antisemitism provides comprehensive, meticulously documented evidence that a readily discernible, uniquely Islamic antisemitism—specific Muslim hatred of Jews—has been expressed continuously since the advent of Islam. Writing in 1971, S.D. Goitein, the pre-eminent scholar of Muslim-Jewish relations as revealed in the Geniza documentary record of the high Middle Ages (950-1250 C.E.), employed the term antisemitism, “…in order to differentiate animosity against Jews from the discrimination practiced by Islam against non-Muslims in general. Our scrutiny of the Geniza material has proved the existence of ‘antisemitism’ in the time and the area considered here…”. Goitein cited as concrete proof of his assertion that a unique strain of Islamic Jew hatred was extant at that time (i.e., up to a millennium ago)—exploding the common assumption of its absence—the fact that letters from the Geniza material, “…have a special word for it and, most significantly, one not found in the Bible or in Talmudic literature…but one much used and obviously coined in the Geniza period.” Important examples of antisemitic motifs in the foundational Muslim texts are presented: from the Koran and Koranic exegesis by the greatest classical and modern Muslim commentators; the hadith (words and deeds of the Muslim prophet Muhammad as recorded by pious Muslim transmitters), the sira (earliest Muslim biographies of Muhammad), as well as the writings of influential Muslim jurists, theologians, and scholars, from the Middle Ages through the contemporary era. These primary sources, and seminal secondary analyses translated here for the first time into English such as Hartwig Hirschfeld’s mid 1880s essays on Muhammad’s subjugation of the Jews of Medina, and George Vajda’s elegant, comprehensive 1937 study of the hadith—detail the sacralized rationale for Islam’s anti-Jewish bigotry. Numerous complementary historical accounts illustrate the resulting the plight of Jewish communities in the Muslim world across space and time, culminating in the genocidal threat posed to the Jews of Israel today. The Legacy of Islamic Antisemitism debunks the conventional wisdom which continues to assert that Muslim Jew hatred is entirely a 20th century phenomenon, a loose amalgam of re-cycled medieval Christian Judeophobic motifs, calumnies from the Czarist Russia “Protocols of the Elders of Zion”, and standard Nazi propaganda, that only arose after the advent of the Zionist movement and the protracted Arab-Jewish conflict over all of the lands comprising the original 1922 Mandate for historical Palestine. Scholars, educators, and interested lay readers will find this collection an invaluable resource for understanding the phenomenon of Muslim antisemitism, past and present. An updated Author’s Preface for this new edition—which includes materials through January 3, 2020—elucidates the current global pandemic of Muslim Antisemitism, and its resulting violent manifestations, in Israel, Western Europe, and the United States. Doctrinal drivers of this hatred, as espoused by iconic Muslim religious leaders representing the pinnacles of institutional Islamic religious education—both Sunni and Shiite—are introduced. This compendious, timely exposé rivets upon freshly translated samples of modern, seminal Koranic glosses—rife with Jew-hatred—which shape current understandings of Islam’s holy book, and Islam itself, by the Muslim masses. The new Preface concludes with a focused discussion about why non-Muslim religious leaders, especially Jews, must admonish institutional Islam to begin its own process, akin to Vatican II/Nostre Aetate, of expunging at least the most virulent Jew-hating motifs from Islam’s core theology.