Christian-Muslim disagreement is fundamentally about the means of divine revelation

Evidence

Islam and Christianity are concerned apparently with much the same themes; fundamentally, they differ about the means that God has used to reveal Himself. They differ about the nature of revelation itself; about the nature of the revelation which they agree was made by Christ; and about the nature of the revelation which only Muslims believe was made through Muhammad. The field of disagreement involves such questions as the character of prophethood, of the Trinity of Persons in the Godhead, and of the Incarnation. — Norman Daniel, Islam and the West, 38

Categorization

• DEFINE: Provides a precise framing of the core theological fault line between the two religions: differing views of revelation itself, not merely differing doctrines.
• XREF: connects to: Christianity and Islam differ fundamentally over how revelation unfolds; Christian-Muslim controversy necessarily centers on their fixed points of doctrinal disagreement