On July 29, 1902 a massive funeral procession for Jacob Joseph, the esteemed Chief Rabbi of the Orthodox community, wound its way through the streets of New York's Lower East Side. The solemn occasion was marred, however, when the procession was attacked by a group of factory workers. As the melee blossomed into a full-scale riot, a contingent of New York City policemen arrived and proceeded to pummel and arrest the mourners rather than the instigators. Historians have consistendy cited this ugly incident as a vivid example of Irish Catholic antisemitism, noting that both the workers and policemen were “predominantly Irish.” Indeed, it was a quest to learn more about the roots of Irish Catholic antisemitism that drew this historian to the subject. And yet, a thorough examination of the incident produced a startling result: a dearth of Irish defendants and a flawed historiography that ultimately call into question the validity of the Jacob Joseph Funeral Riot as an example of Irish Catholic antisemitism.