Medieval Christian anti-Islamic polemics were written without personal knowledge of Islam

Evidence

For Roger Bacon, neither Islam nor Judaism had the support of philosophy. These were in three cases the conclusions of writers with no personal knowledge of Islam. — Norman Daniel, Islam and the West, 358

Categorization

• XREF: connects to: Self-styled anti-sharia experts lacked even basic knowledge of Islamic law — Cyra Akila Choudhury, Racecraft and Identity in the Emergence…, 409