God clarified in the Quran that Jesus was not crucified; rather, it was made to seem that way to the Jews, and that God raised him to the Heavens.
“…They did not kill him, nor did they crucify him, but (another) was made to resemble him to them…” (Quran 4:157)
“God lifted him up to His presence. God is Almighty, All-Wise.” (Quran 4:158)
As such, Islam denies that Jesus came to this earth with the purpose of sacrificing himself for the sin of Adam, Eve, and the rest of humanity, freeing them from its burden. Islam strictly rejects the notion that any person bears the sin of another. God says:
“No bearer of burdens shall bear the burden of another.” (Quran 39:7)
Also, Islam stresses the notion that God is able to and forgive all sins, if a person truly repents and then refrains from repeating it. God does not need any blood sacrifice for that, let alone descend in the form of man himself and die for every man's sins. Rather, God’s mercy extends to all creatures, believers and disbelievers alike. The door to forgiveness is open to anyone who seeks it.
The Second Coming of Christ
As Christians do, Muslims also believe in the return of Jesus the Messiah to earth, although his role and reason for his return does differ from what the Christians propose. He will return to earth first and foremost to prove his mortality and refute the false beliefs people held about him. He will live a normal life, marry, and also die as any other human. At that point, the matter will be clear concerning him, and all people will have believed that he was truly mortal.
“There is not one of the People of the Scripture but will believe in him (Jesus) before his death, and on the Day of Resurrection he will be a witness against them.” (Quran 4: 159)
Jesus will also fight the false Christ, who will call people to the belief that he is God, and who will appear just before he returns. Jesus will defeat the antichrist, and all people will accept the true religion of God. The world will see a type of peace and serenity unfelt in history, all worshipping the same God, subservient to Him alone, and at peace with one another.