Conspiracy theories have been associated to a paranoid way of thinking; however they are not always marginal and utterly irrational. Conspiracist narratives reflect rival strategies of interpretation, and can have a real impact on the social and political praxis. More than factual accuracy, I suggest that what distinguishes a conspiracy theory is a type of discourse, its key features being: suspicion, intentionality, personification, speculation and denunciation.This paper examines conspiracy theories that dominated Greek public discourse before and after the economic crisis of the years 2010s, particularly those introduced by political actors as a means of political persuasion and mobilisation. Greek political culture and the discredit of the political system since 2010 led to frequent expressions of distrust towards political elites and foreign “powers”. My analysis focuses on the acceptability of conspiracy theories in relation with social representations, dominant stereotypes and widely shared interpretative schemata.The following cases of conspiracy theories are discussed: a) the wildfires that ravaged large parts of Greece in 2007, supposedly set by “foreign agents”; b) the alleged assassination plot in 2008-2009 against the PM Karamanlis by Western / US secret services; c) the conspiracy theories attributing the economic crisis to a deliberate foreign plot against Greece. The paper examines in particular the attribution of blame to presumed “enemies”, in line with nationalist discursive themes and stereotypes.