Medieval Christian writers located Islam between Christianity and Judaism on shared belief.

Evidence

Thus Alan of Lille could say that the Muslims agree with the Christians in affirming one God, Creator of all things together; and with the Jews in denying the Trinity within the divine unity. Again, Vitry said that Muslims, like Jews, reject pork and scaleless fish as food, ‘but agree with the Christians in this, that they believe in one only, almighty God, Creator of all things’. … Fra Fidenzio was noncommittal: ‘For they confess there to be one God, Creator of Heaven and Earth, and of all things visible and invisible; and they say that God is one, alone and true, Who is not multiplied and has no consort.’ The first part of this formula seems to derive from the Nicene Creed, whereas Qur’anic phrases lie behind its later phrases; but there is neither approval nor disapproval. — Norman Daniel, Islam and the West, 251

Categorization

• XREF: Connects to historical treatments of Christian-Muslim polemic and the medieval positioning of Islam as midway between faiths. — connects to: Some medieval Christians recognized all three faiths worshipped the same one God.