Lucifer, who was an angel who was kicked out of heaven, later on became Satan, for he wanted to be like the most high God, and he wanted worship and praise.
Muslims are not taught about Lucifer and Satan, being the one and the same. They are taught that somehow Satan was made out of fire.
But, be that as it may, Mohammed wanted to be greater than Christ, so he set out on that mission to persuade the people that he was greater than Jesus. He taught that Jesus did not really die at all, but that God in his mercy just took him to heaven. Mohammed could not bear to tell that Jesus shed his life's blood to save us all from sin, and that he alone can save, for without the shedding of blood there is no remission for sin.
Mohammed has taught that Jesus will indeed come again one day, but that he will follow Mohammed, and then live only 40 years and then die. But when Jesus comes, after that, there is no more death or sorrow. We will have peace ever more.
Great is the Lord and greatly he be praised. Great are his benefits. Great is his love for us all, no matter who we are, Muslim, Jew, or Gentile. One is not preferred over the other. All who repent and turn from evil, and accept Christ as the Saviour of men, may enter into his kingdom.
Actually, they are. They know him as Allah, the moon god.