Is the god, Allah, of Islam the same God as the Hebrew “Yahweh” and the Christian “the Father”? If so, why is “Our Father” the God of Peace, and the “Allah” the god of vengeance and spreading the faith by the sword?
Allah is simply an Arabic word for God. Thus when a Muslim says “There is no God but Allah” he is actually saying “There is no God but God.” Arabic Christians use the word “Allah” in the same manner as English speakers would use the word “God.”
It is important to remember that “Allah” is not a name of God, it is the word for God.
The Church regards with esteem also the Muslims. They adore the one God, living and subsisting in himself; merciful and all-powerful, the Creator of heaven and earth, who has spoken to men; they take pains to submit wholeheartedly to even his inscrutable decrees, just as Abraham, with whom the faith of Islam takes pleasure in linking itself, submitted to God.
- Nostra Aetate 3