because if you read quran , you will find that jesus is the only person who is alive in flesh & blood on heaven , where as the others ( including mohammed are not). The reason being, when jesus was just about to be arrested by the romans, an angel switched him with his decieving disciple judas. Therefore jesus was lifted to heaven. On doomsday , when everything god has created will come to an end, God has promised a messaih will come , and provide deliverence to the believers. This promised messiah is jesus.
