Medieval Christian writers recognized Islam shared their moral precepts

Evidence

Even so we can say that there was in the West some knowledge that Islam was a system of positive requirements, and not only a series of relaxations. Praise of Muslim practice, to shame Christians, equally with attempts to describe Islamic morals, made it clear that to some extent Islam and Christianity drew upon a common stock of precepts. — Norman Daniel, Islam and the West, 1128

Categorization

• XREF: Contrasts strongly with the standard narrative of total medieval ignorance/hostility toward Islam familiar from this book’s earlier chapters on polemics. — connects to: By 1250 the unity-of-God doctrine was common Christian knowledge about Islam; Medieval storytellers assumed Muslims shared Christian moral standards.; Islamic scholarship by Christian academics reframed Islam as a shared spiritual enterprise — Norman Daniel, Islam and the West, 1740