A polemical work made Jews and Muslims mutually undermine each other’s scriptures

Evidence

The Rabbi Samuel letters, which were put into Latin only in the middle of the fourteenth century, were asserted by their translator to have long circulated in Arabic among Christians. Their originality was to interconnect the mutual verification of the Three Laws: that is to say, both Rabbinic teaching and the Qur’an confirm the truth of the Gospel, while each of them destroys the claim of the other. Islam taught the Rabbis that Jesus Christ is the Messias, while the Jews made the Muslims understand that Muhammad was neither Messias nor Paraclete. — Norman Daniel, Islam and the West, 311

Categorization

• QUESTION: The ‘Rabbi Samuel letters’ appear to be a Christian forgery weaponizing Jewish authority against Islam — worth verifying their provenance and reception.