Do Catholics and Muslims worship the same God?

Catholics and Muslims direct their worship toward the one Creator, the God of Abraham. Yet Islam rejects the Trinity, Christ's divinity, and the Incarnation, so its understanding of God contains profound errors.

What the Church actually says. The Second Vatican Council taught that Muslims "adore the one God," the merciful Creator and Judge, and seek to submit to His decrees. The Catechism likewise says that Muslims profess to hold the faith of Abraham and "together with us they adore the one, merciful God" (CCC 841). This means they intend to address the one God who created heaven and earth, not a separate deity existing alongside the God Christians worship.

The differences concern God's identity as He has revealed it. Christians confess one God in three divine Persons: Father, Son, and Holy Spirit (CCC 253-255). Muslims explicitly deny the Trinity and deny that Jesus is God the Son made man. Catholic faith holds that Jesus Christ is the definitive revelation of the Father: "Whoever has seen me has seen the Father" (Jn 14:9). To reject the Son is to lack the fullness of knowledge of the Father (1 Jn 2:23). These disagreements are central, not minor differences in terminology.

How both claims fit together. A person can intend to speak about a real person while holding serious false beliefs about that person. In a similar way, Muslims intend to worship the Creator and God of Abraham, but misunderstand who He is. Christians know through divine revelation that God's inner life is Trinitarian and that the eternal Son became man for our salvation (Jn 1:1, 14). Islamic teaching therefore cannot be treated as an equally true revelation or an alternative saving covenant.

How Catholics should respond. Catholics should speak to Muslims with respect, justice, and charity, while clearly witnessing to Christ. The Church rejects contempt, coercion, and religious hatred. She also continues her missionary command because Jesus sent His disciples to make all nations His disciples and baptize them in the name of the Father, Son, and Holy Spirit (Mt 28:19-20). If you have a Muslim friend, begin with shared belief in one Creator, then explain calmly why the Trinity and the identity of Jesus matter.