Christian polemicists repeatedly charged Islam with being fundamentally irrational

Evidence

At the same time that Christian theologians began to admit that they were unable to prove their doctrines through reason, in part in reaction to the works of Muslim and Jewish philosophers, they increasingly lambasted Muslims (and Jews) as “carnal” and “irrational.” This tendency is nowhere more blatant than in the works of Dominican missionary Riccoldo da Montecroce. — John V. Tolan, Saracens, 1234 (#expands, via linked claim)

Categorization

• XREF: connects to: Mediaeval critics mocked the Qur’an’s chapter names as irrational; The carnal Paradise was the central symbol of Christian anti-Islam polemic; Western commentators frame Muslim leaders as irrational while granting Israelis and Americans rationality — Deepa Kumar, Islamophobia and the Politics of…, 331 (+5 more)

Broader Connections

• Medieval Christian theologians branded Muslims irrational while abandoning rational proof of their own faith #expands (0.93) — John V. Tolan, Saracens, 1234