Both traditions believe in Jesus, but what they believe about Jesus divides them sharply.
Muslims believe Jesus was a major prophet of God, one in a long line of prophets that includes Noah, Abraham, David, and most importantly, Muhammad, the final prophet.
Both Muslims and orthodox Christians believe Jesus was born of a virgin and performed miracles during his earthly life.
Muslims reject the heart of the Christian message, that Jesus died on the cross to pay for the sins of mankind, and was resurrected from the dead. They believe he did not die, but that it was made to appear that he died.
Both believe he will come again at the end of the age.
But while Christians believe he will set up a kingdom that he will rule forever, Muslims believe he will marry, live a normal life, and die a normal death.