The European Parliament (EP) adopted, between 2004 and 2009, a series of resolutions calling for recognition of Communist crimes and commemoration of their victims. This article focuses on an overlooked aspect of anti-Communist activism, the awareness-raising activities carried out by some Central European Members of the European Parliament (MEPs) to perpetuate the cause through networks that enable them to exchange institutional credibility, scientific legitimacy, and policy-oriented knowledge with Institutes of National Memory, parts of academia, and victims associations. Although they use the techniques of expertise and scandalization that are often effective in European institutions, these memory entrepreneurs have largely failed to further their claims in the European Union (EU) after 2009. In line with the turn toward “practice” in EU studies and the increased attention paid to agency in memory politics, this article contends that the conditions of production of their narrative of indictment of Communism accounts for this relative lack of success. Because their demands produced a strong polarization inside the EP while colliding with established Western patterns of remembrance, these MEPs’ reach remains limited to their Conservative peers from the former Eastern bloc. This weak national and ideological representativeness hinders their capacity to impose their vision of the socialist period in the European political space.