Christian rulers denigrated Muhammad to justify their own hegemony over Moorish Spain

Evidence

Lucas is familiar with the brief polemical life of Muhammad that Eulogius had discovered in a Navarese monastery in 850 and incorporated into his Liber apologeticus martyrum, and that had subsequently been incorporated into the Asturian Prophetic Chronicle: Muhammad as a scoundrel and magician who invents bogus revelations to explain away his epileptic fits, who claims to be the Messiah. … The denigration of Muhammad is a key element in the affirmation of Leonese hegemony; there can be no legitimacy in the rule of the Moors, followers of the heresiarch Muhammad. — John V. Tolan, Saracens, 937

Categorization

• XREF: Genealogically grounds the medieval tropes — Muhammad as fraud, epileptic, magician, pseudo-Messiah — that vault claims (Anidjar/Aziz/Razack) trace into modern Islamophobia; this locates an early textual source chain (Eulogius 850 to Prophetic Chronicle).
• ADDENDUM: Supports the genealogy in ‘Complaints About Immodesty’/‘Sacrifice’ style argument that moral-ideological denigration of the religious Other served political-legitimacy functions; here explicitly hegemony.