Only Christians believe that Jesus was killed on the cross then resurrected. In that respect Islam is similar to Docetism belief that Jesus’ physical body was an illusion, as was his crucifixion; that is, Jesus only seemed to have a physical body and to physically die, but in reality, he was incorporeal, a pure spirit, and hence could not physically die. Docetism believes that Jesus Christ did not actually die, and therefore was never resurrected bodily. This belief is actually explained in the Quran. “They did not kill him, nor did they crucify him, but they thought they did.” (Quran 4:156) “God lifted him up to His presence. God is Almighty, All-Wise” (Quran 4:157).
Death and resurrection is a core Christian belief and it relates to the concept of atonement. However, the heretical sects of Christianity who do not believe in the resurrection cannot then believe in the atonement you need to both for the argument to work correctly. According to this belief, Jesus died to save mankind from sin. However, this is not stated explicitly in the four gospels which form the primary source texts of Christianity. It is found, however, in Romans 6:8,9. Christians believe Jesus was spat on, cut, humiliated, kicked, striped, and finally hung up on the cross to endure a slow and painful death. According, to Christian belief, the original sin of Adam and Eve of eating from the forbidden tree was so great that God could not forgive it by simply willing it, rather it was necessary to erase it with the blood of a sinless, innocent Jesus. The four Gospels and the Epistles of St. Paul are the main sources of Christianity that discuss the Resurrection of Jesus after his crucifixion.
According to St. Matthew, Jesus appeared to the holy women, and again on a mountain in Galilee. Mark’s Gospel tells a different story: Jesus was seen by Mary Magdalene, by the two disciples at Emmaus, and the Eleven before his Ascension into heaven. Luke’s Gospel says Jesus walked with the disciples to Emmaus, appeared to Peter, and to the assembled disciples in Jerusalem. In John’s Gospel, Jesus appeared to Mary Magdalene, to the ten Apostles on Easter Sunday, to the Eleven a week later, and to seven disciples at the Sea of Tiberias.