This article deals with two spurious texts by Adolphe Crémieux, the French Alliance israélite universelle, and neo-Nazi distortions and antisemitic ideology aiming at Jewish universalism. Based on a detailed reading of French, German, and English sources, the author’s point of departure is the German neo-Nazi Horst Mahler and his antisemitic,conspiracy-driven agitation against Crémieux in recent years. Crémieux was a representative of French Jewish liberal and universalistic circles in the nineteenth century. For example, as a politician he stopped slavery in the French colony of the Caribbean in 1848. Neo-Nazis as well as Islamists defame Jewish universalism. The Protocols of the Elders of Zion are invoked by both neo-Nazis, who base their hatred of Judaism and Jews on French Catholic as well as Nazi German sources, and by Islamists.Keywords: Alliance israélite universelle, Adolphe Crémieux, Horst Mahler, Protocols of the Elders of Zion, Radio Islam, universalism