The Qur’an says, “For those who reject Allah, there is a terrible penalty: but for those who believe and work righteous deeds, there is forgiveness and a magnificent reward (Surah 35:7). This great reward is janna, a garden paradise, an eternal place of sensual and spiritual pleasures.
In Islam, there is no savior. That is not to say that salvation is impossible, for Allah is merciful and compassionate. He can always forgive---for Allah’s will is supreme---but He is primarily the judge. There are many descriptive warnings about hellfire and punishment in the Qur’an.
All men should fear Judgment Day, in which each person’s deeds will be weighed on a scale. “Recording angels” keep a list of every deed, both good and bad. Islamic teachers assign credits to deeds related to the pillars of Islam. It is unthinkable for Muslims to abandon their accumulation of credits and trust a Savior.
Muslims find God virtually unapproachable. There is no concept of relationship with God as in Christianity, and no assurance of heaven, except though martyrdom. In Islam, there is no guarantee of salvation. The only possible guarantee is to be martyred for the cause of Islam, usually in jihad, and that is what the terrorists are told. It is much easier for Muslims to go into paradise through jihad/martyrdom, than to perform all the rituals and duties and still not know for sure whether they will go to paradise or not. The Qur’an says that martyrs killed in the way of God, or fighting for Allah, will go straight into the paradise of Allah.
Christians believe that, after death, all people await the final Judgment, when both believers and unbelievers will be resurrected. All will be judged according to the deeds they have done, but believers will be saved, because God removed the record that contained the charges against them. He destroyed it by nailing it to the cross of Jesus. Colossians 2:14 says, “having canceled the written code, with its regulations, that was against us and that stood opposed to us; he took it away, nailing it to the cross.” This would therefore remove the list of bad deeds kept by any Muslim’s “recording angel.”
In Christianity, God does not judge on a curve. He does not compare one person to another. Neither does He weigh your good deeds against your bad deeds. Instead, He compares you to Himself. In order to get into Heaven based on your works, you have to be as holy and perfect as He is. Matthew 5:20 states, “For I tell you that unless your righteousness surpasses that of the Pharisees and the teachers of the law, you will certainly not enter the kingdom of heaven.” And 1 Peter 1:16 says, "for it is written: "Be holy, because I am holy." This is precisely why we need a Savior.
Even if one’s list of good deeds outweighed their list of bad deeds, it would not make them acceptable to God. The Bible says this would only cause boasting and pride, as though someone could impress God by his or her good deeds. Ephesians 2:8-10 says, “For it is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God—not by works, so that no one can boast. For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do.” Instead, God has credited Christians with the righteousness of Christ, so salvation is a gift, not earned by anyone---not even martyrs---but bought with a great price---Jesus’ blood (See 1 Corinthians 6:20 and 1 Corinthians 7:23).
In addition to this great gift, God the Father adopts those He saves into His family so they may live with Jesus in Heaven. To be saved involves being “born again” into a new relationship with God. John 3:5 states, “Jesus answered, "I tell you the truth, no one can enter the kingdom of God unless he is born of water and the Spirit.”
Thinking about Allah as Abba-Father is difficult for some Muslims. Any negative view of the earthly father role will twist one’s view of God. In Western cultures, parenting trends err toward permissiveness (more love than discipline). In the East, fathers tend to be negligent or authoritarian (more discipline than love). God is a Father Who shows both love and discipline. He wants loving followers, not just slaves or spoiled children.
This view of fatherhood makes it easier to relate to God as Abba and to come to Him as a humble child, ready to be loved and disciplined. Jesus said one must enter God’s kingdom as a little child. “I tell you the truth, anyone who will not receive the kingdom of God like a little child will never enter it." (Mark 10:15)
The final book of the Bible describes the future scene of a huge family gathering with many from every tribe, tongue, people and ethnic group gathered around the throne of God, as shown in Revelation 5:
“Then I saw in the right hand of him who sat on the throne a scroll with writing on both sides and sealed with seven seals. And I saw a mighty angel proclaiming in a loud voice, "Who is worthy to break the seals and open the scroll?" But no one in heaven or on earth or under the earth could open the scroll or even look inside it. I wept and wept because no one was found who was worthy to open the scroll or look inside. Then one of the elders said to me, "Do not weep! See, the Lion of the tribe of Judah, the Root of David, has triumphed. He is able to open the scroll and its seven seals." Then I saw a Lamb, looking as if it had been slain, standing in the center of the throne, encircled by the four living creatures and the elders. He had seven horns and seven eyes, which are the seven spirits of God sent out into all the earth. He came and took the scroll from the right hand of him who sat on the throne. And when he had taken it, the four living creatures and the twenty-four elders fell down before the Lamb. Each one had a harp and they were holding golden bowls full of incense, which are the prayers of the saints. And they sang a new song: "You are worthy to take the scroll and to open its seals, because you were slain, and with your blood you purchased men for God from every tribe and language and people and nation. You have made them to be a kingdom and priests to serve our God, and they will reign on the earth." Then I looked and heard the voice of many angels, numbering thousands upon thousands, and ten thousand times ten thousand. They encircled the throne and the living creatures and the elders. In a loud voice they sang: "Worthy is the Lamb, who was slain, to receive power and wealth and wisdom and strength and honor and glory and praise!" Then I heard every creature in heaven and on earth and under the earth and on the sea, and all that is in them, singing: "To him who sits on the throne and to the Lamb be praise and honor and glory and power, for ever and ever!" The four living creatures said, "Amen," and the elders fell down and worshiped.”
Boasting of good deeds would be unthinkable, because Jesus, the Lamb of God, sits upon the throne. Everyone in this great crowd honors Jesus as their substitute sacrifice, just as God pictured beforehand when He provided a ram to die in place of Abraham’s son, as in Genesis 22:
"Some time later God tested Abraham. He said to him, "Abraham!"
"Here I am," he replied. Then God said, "Take your son, your only son, Isaac, whom you love, and go to the region of Moriah. Sacrifice him there as a burnt offering on one of the mountains I will tell you about." Early the next morning Abraham got up and saddled his donkey. He took with him two of his servants and his son Isaac. When he had cut enough wood for the burnt offering, he set out for the place God had told him about. On the third day Abraham looked up and saw the place in the distance. He said to his servants, "Stay here with the donkey while I and the boy go over there. We will worship and then we will come back to you." Abraham took the wood for the burnt offering and placed it on his son Isaac, and he himself carried the fire and the knife. As the two of them went on together, Isaac spoke up and said to his father Abraham, "Father?" "Yes, my son?" Abraham replied. "The fire and wood are here," Isaac said, "but where is the lamb for the burnt offering?" Abraham answered, "God himself will provide the lamb for the burnt offering, my son." And the two of them went on together. When they reached the place God had told him about, Abraham built an altar there and arranged the wood on it. He bound his son Isaac and laid him on the altar, on top of the wood. Then he reached out his hand and took the knife to slay his son. But the angel of the LORD called out to him from heaven, "Abraham! Abraham!" "Here I am," he replied. "Do not lay a hand on the boy," he said. "Do not do anything to him. Now I know that you fear God, because you have not withheld from me your son, your only son." Abraham looked up and there in a thicket he saw a ram caught by its horns. He went over and took the ram and sacrificed it as a burnt offering instead of his son. So Abraham called that place The LORD Will Provide. And to this day it is said, "On the mountain of the LORD it will be provided." The angel of the LORD called to Abraham from heaven a second time and said, "I swear by myself, declares the LORD, that because you have done this and have not withheld your son, your only son, I will surely bless you and make your descendants as numerous as the stars in the sky and as the sand on the seashore. Your descendants will take possession of the cities of their enemies, and through your offspring all nations on earth will be blessed, because you have obeyed me." Then Abraham returned to his servants, and they set off together for Beersheba. And Abraham stayed in Beersheba. Some time later Abraham was told, "Milcah is also a mother; she has borne sons to your brother Nahor: Uz the firstborn, Buz his brother, Kemuel (the father of Aram), Kesed, Hazo, Pildash, Jidlaph and Bethuel." Bethuel became the father of Rebekah. Milcah bore these eight sons to Abraham's brother Nahor. His concubine, whose name was Reumah, also had sons: Tebah, Gaham, Tahash and Maacah.”
Most of this information is from “Islam & Christianity,” Rose Publishing; and from the DVD, “Radical Islam On The March.”