In one of their songs, [Weshalb ich Menschen nicht mag (Why I don't like humans)], the German hip-hop crew Audio88 &Yassin say: "…and then you talk about Pride, but you only mean Goethe! But never Sachsenhausen!" They are targeting a national identity that sees itself as a so-called cultural nation and, as such, places cultural-philological developments & positive dynamics at the centre of the consideration of identity construction. The extent to which this sentence contains historical truth remain to be seen, but the analytical potential of it is enormous: it radically opens up the space for questioning identity formation or identity construction as a process - mostly with positive connotations - of self-assurance and conceptual-distinctive self-exaltation. This should not only apply to national identities, but also to the formation of theological, ecclesial, religious identities of entities in the realm of institutionalised faith. For the Christian churches, an essential and seldom central question of theological history seems to be of extreme importance: the question of the identity-forming power and the use of the theology of the murder of God as an impulse for the generation of internal coherence & external radical need for distinction, beginning in the age of apologetics, but also far beyond: Whether in the ritual murder legends of the High Middle Ages, the host desecration legends of the Late Middle Ages & the modern age or the conspiracy tales of the 21st century, the core narrative of deicide can be discovered in all these narratives as an judeophobic accusation & anti-Semitic tool of discrimination. The proposed lecture aims to shed light on the origins & continuous transformations & dynamics of the theology of the murder of God by showing the overarching connections, not least to avoid having to face the accusation - regarding identity discourses in Christianity - "... And then you talk about 'pride', but only mean mercy! But never deicide narratives!"