Do Christians and Muslims worship the same God?

At first glance the answer seems obvious. Christians and Muslims both say there is one God, both call Him the Creator of heaven and earth, and both trace their spiritual heritage back to Abraham. Muslims even use the word Allah, which is simply the Arabic word for God, the same word Arabic-speaking Christians have used for centuries to refer to the God of the Bible. So it can feel like splitting hairs to say the two faiths worship different gods.

But the question is not really about language or ethnicity, it is about identity. Two people can use the same title, God, and still be describing two fundamentally different beings if their core descriptions contradict one another. That is exactly the situation between biblical Christianity and Quranic Islam, and the Bible itself gives us the test for telling the difference.

John writes plainly, "No one who denies the Son has the Father. Whoever confesses the Son has the Father also" (1 John 2:23). According to Scripture, knowing and worshiping the true God is inseparable from acknowledging who Jesus is. Jesus said, "Whoever has seen me has seen the Father" (John 14:9), meaning the character, nature, and glory of God the Father are perfectly revealed in the Son.

Islam explicitly and repeatedly denies that Jesus is the Son of God, denies the Trinity, and denies that Jesus died on the cross for sin. By the Bible's own standard, a God who has no Son, was never incarnate, and did not die for sinners is not the God revealed in Scripture, however much the two descriptions might otherwise overlap on attributes like oneness, power, and mercy.

It is true that the Quran describes Allah as creator, merciful, and just, and the Bible describes the true God the same way. There is real overlap in general attributes, which is part of why Muslims and Christians can have meaningful conversations about ethics and the existence of God. Paul even used common ground with pagan audiences who worshiped an unknown god as a bridge to proclaim the true God revealed in Christ (Acts 17:23).

But shared attributes are not the same as a shared identity. The biblical God is triune, one God in three persons, Father, Son, and Holy Spirit (Matthew 28:19). He is a God who so loved the world that He gave His only Son (John 3:16). Islam's Allah is strictly unitarian and has, in Islamic teaching, no son and takes no partners. These are not two descriptions of the same being seen from different angles; they are two incompatible claims about who God fundamentally is.

Some argue that since both religions descend historically from a common Abrahamic tradition, they must ultimately be aiming at the same God even if their pictures of Him are incomplete or distorted. But the Bible does not treat theology as negotiable in this way. Paul warns of those who might come preaching "another Jesus" or receiving "a different spirit" than the one believers received (2 Corinthians 11:4), showing that a mistaken picture of Christ is not a minor variation but a different message altogether.

This matters pastorally too. If Christians and Muslims already worship the same God under different names, there would be no urgency in sharing the gospel with Muslim friends and neighbors. But Scripture insists that knowing the Father comes only through the Son (John 14:6), which is precisely why missions to the Muslim world, done in humility and love, remain a vital work of the church.

None of this means Christians should be harsh or dismissive toward Muslims, who are made in God's image and deeply valued by Him. Christians can affirm real common ground: belief in one Creator, moral accountability, prayer, and fasting, while still being honest that the two faiths' pictures of God diverge at the most important point. Being clear about the difference is actually an act of love, because it takes seriously what Muslims believe rather than flattening real convictions into a vague sameness.

The most loving thing a Christian can do is introduce a Muslim friend to the Father as He has actually revealed himself, through the Son. "For God, who said, 'Let light shine out of darkness,' has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ" (2 Corinthians 4:6). That is not an insult to Islam; it is an invitation into the fullest possible knowledge of the true and living God.