A Christian and Muslim can use many of the same words while meaning different things. Jesus. Messiah. Gospel. Revelation. That is why a respectful conversation needs more than quick agreement.
Start by letting each text speak.
Important points of agreement
The Quran refers to Jesus as the Messiah and son of Mary. It presents His birth as a divine act and speaks of miracles done by God's permission (Quran 3:45-49). Mary receives unusual honor in Islam, and an entire chapter of the Quran bears her name.
Christians recognize those names and stories, although the details and meaning differ. Matthew and Luke describe Jesus' birth. The Gospels repeatedly show Him healing the sick and confronting evil.
So a Christian should never tell a Muslim, “You know nothing about Jesus.” A better question is, “What have you been taught about Him?”
The Son of God
The New Testament's central confession is that Jesus is “the Christ, the Son of the living God” (Matthew 16:16). John says his Gospel was written so readers could believe exactly that (John 20:31). Jesus also describes Himself as the Son whom the Father sent (John 10:36).
Islam rejects calling Jesus the Son of God. Quran 4:171 calls Him Messiah and messenger, then warns against language Muslims understand as compromising God's oneness. Christians and Muslims therefore do not mean the same thing when both say they honor Jesus.
Christians should explain their language carefully. “Son of God” does not mean God had a physical relationship with Mary. The phrase identifies Jesus through His unique relationship with the Father and the testimony given about Him in the Gospels.
The crucifixion
The New Testament says Jesus was crucified under Pontius Pilate, died, and was buried. The four Gospels agree on this, and Paul treats it as part of the message he received and passed on (1 Corinthians 15:3-4).
Quran 4:157 says Jesus' opponents did not kill or crucify Him and that it was made to appear so. Muslim interpretations differ on some details, but mainstream Islamic teaching denies the Gospel account of Jesus' death.
You can read the passage directly at Quran.com. This is a real disagreement. Calling it a minor translation problem would be unfair to both faiths.
The resurrection
The first Christian witnesses said God raised Jesus bodily from the dead. Peter preached the resurrection in Jerusalem (Acts 2:24, 32). Paul said Christian faith is futile if Jesus was not raised (1 Corinthians 15:14-17).
Islamic tradition generally teaches that God raised Jesus without the crucifixion and that He will return. That is different from the apostolic announcement of a public execution, burial, empty tomb, and appearances afterward.
The historical question matters. What happened to Jesus in Jerusalem? Read Matthew 26-28 or John 18-21 before settling for a summary from either side.
How Christians should speak with Muslims
Listen long enough to discover what your friend actually believes. Muslims come from many cultures and levels of practice. Do not treat one person as a spokesperson for nearly two billion people.
Speak plainly about the cross and resurrection. Avoid jargon. If your friend asks why the cross matters, explain forgiveness and God's love demonstrated through His Son (Romans 5:8). If you do not know an answer, say so and return after reading.
And keep sharing life. A meal after a difficult conversation can say something important: disagreement did not cancel love.