This study analyzes the instrumentalization of antisemitic conspiracy narratives, using the anti-Soros discourse promoted by Viktor Orbán s populist government in Hungary as a case study. From blood libels and the Protocols of the Elders of Zion to contemporary manifestations, antisemitism has adapted to meet different historical, political, and social contexts. The research, structured into three main sections, investigates: 1) the historical and conceptual foundations of conspiracy theories and antisemitism, 2) the relationship between far-right populism and these narratives, and 3) the analysis of the anti-Soros discourse in Hungary through Orbán s speeches and the national questionnaire on the "Soros Plan." The study demonstrates how Orbán s government uses antisemitic stereotypes, employing "dog whistles," to mobilize popular support and justify authoritarian policies in opposition to the European Union. It concludes that the Hungarian case fits into a historical pattern in which antisemitic conspiracy narratives serve as a significant tool for political manipulation.