Christians believe in the Trinity, which is a contradiction to the oneness of God in Islam.

The doctrine of the Trinity is often misunderstood by those outside the Christian faith. It is not a belief in three gods, but rather one God in three persons. This concept is rooted in the nature of God as revealed in Scripture. In John 1:1, it states, 'In the beginning was the Word, and the Word was with God, and the Word was God.' This verse highlights the divinity of Christ, affirming that He is fully God while also being distinct from the Father. Furthermore, in Matthew 28:19, Jesus commands His followers to baptize in the name of the Father, the Son, and the Holy Spirit, indicating the co-existence and co-equality of the three persons. The early Church, through councils and creeds, articulated this understanding to clarify that the Trinity does not divide God's oneness but rather expresses the fullness of His nature. Thus, the Christian view of God is not contradictory to the Islamic view of God's oneness but is a deeper revelation of who God is.