The Quranic Jesus was recognized as philosophically coherent enough to trouble Christian readers

Evidence

The “blasphemies” that shock him so, are, among others, that Jesus is man, not God; that he was in fact a Muslim who never claimed to be God; that the apostles, Abraham, and other biblical figures were Muslim. These are by and large the same ideas that shocked the anonymous annotator of Robert of Ketton’s Latin translation of the Koran. — John V. Tolan, Saracens, 1242

Categorization

• QUESTION: Worth chasing: how widely medieval Christians knew the Quran taught Jesus was a Muslim prophet — this is the doctrine being confronted here.