Gospel means Good News and the Good News is Jesus died for our sins. You believe in another Gospel:
Isaiah 64:6
All of us have become like one who is unclean, and all our righteous acts are like filthy rags; we all shrivel up like a leaf, and like the wind our sins sweep us away.
Even the most righteous acts of the most righteous person is to God but rags with a woman's period on them.
John 10:8
All who have come before me are thieves and robbers, but the sheep have not listened to them.
Jesus tell it like it is, even the most honoured of the Old testament 'holy' people are but thieves and robbers compared to Jesus.
Isaiah 55:9
"As the heavens are higher than the earth, so are my ways higher than your ways and my thoughts than your thoughts."
There is no comparison between man and God and Jesus is God. Without Jesus all are lost. You think you can worm your way into God presence by; 'repenting and forgive others.' Yet you are deceived because we all continually fail to do these things - daily!
Without repentance there is no remission of sins, we must repent. And if we don't forgive others then we are not forgiven according to Jesus and with God it's possible. When we believed, we were saved of our past sins, once we know God, we are to turn from wilful sinning and we won't fail, because he who is in those who belong to Christ is stronger than he who is in the world. With God all things are possible, and with God and through Christ Jesus we can overcome the works of the flesh. I have complete faith that God can do anything and I know that he is helping me to overcome my flesh daily.
And the gospel I believe in is the gospel of God, and it's one gospel preached by Christ and all his apostles, there is one God the father as taught in the Bible and one begotten son Christ Jesus who is under subjection to the father, and he does what the father tells him to do, the head of Christ is God.
God didn't need to come himself into a human body and be crucified by wicked men to appease his own wrath, that makes no sense. Jesus was a living sacrifice, and he laid down this fleshly life, and denied his own will to live by the will of God completely.
For a start Jesus was sent, so he was not God coming, but rather God sent him, and God was in him. It says in the Bible that God was in Christ reconciling the world unto himself by the word of God through the gospel, the ministry of reconcilation. No need for death there. The only death God wants to see is death to self. Jesus was dead to self, and he was dead to the flesh because he didn't sin, and satan had no hold over him. And because he was dead to his flesh, we saw the fullness of God bodily through him, thus Jesus was in the express image of God. And through that death we are reconciled to God by the word of God, but we are saved by his life. As it says in the Bible.
The good news isn't that Jesus died naturally to save us, the good news is the gospel that Jesus preached and that is the gospel of salvation, the good news is that Jesus lived to save us baring witness to the truth and saving as many as would believe in him through the gospel.
Jesus said in john 18
To this end was I born, and for this cause came I into the world, that I should bear witness unto the truth. Every one that is of the truth heareth my voice.
He also said in Matthew 7
Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven;
but he that doeth the will of my Father which is in heaven.
He never said, you must believe that I died on the cross to save you, the cross Jesus died on was the cross that he bore as he died to self daily to live by the will of God and bring us the truth. No sin entered him, he was completely dead to this world.
Jesus nor his apostles preached that Jesus died on the cross to save us, and the cross Paul talks about is the cross Jesus bore, this is the cross that is foolishness to those that perish, because they don't want to take up their cross and follow Jesus, because they love their flesh and this world more than God. The cross is the same cross that Jesus tells us to take up daily to follow him, and if we are not willing to do so, then we are not worthy of him. Nowhere in the Bible does it say that we will go to hell if we don't believe that Jesus was crucified to save us. But rather that we must live by the will of the father, and through Christ by the power of the Spirit we can overcome the world. We are saved through Christ, by the grace of God through faith, not by Jesus dying naturally on the cross, Jesus was murdered by wicked men who were doing the works of their father the devil, Jesus said it was their hour and the power of darkness. God has no dealings with darkness, satan crucified Jesus through wicked men but Jesus overcame by the power of God love. And even by satan putting him through all that suffering, Jesus still didn't sin once, instead he said father forgive them for they know not what they do. Why would God have to forgive them if what they were doing saved everyone?
I know that Jesus had to go through what he did, he had to bare the cup that was set before him, and in doing so Jesus overcame satan. Jesus's himself asked God to take away the cup from him but it was Gods will that he went through it because he had to overcome satan and this world of sin. God told through the prophets what would happen to Jesus, he foreknew what the devil would do to him, and Jesus was willing for it to bring the truth to us and save as many as he could by preaching the gospel of God.
You'll know those who belong to Christ by their fruits, they will have his life in them and they will have the heart of him. And the love of the father will be in their lives as they live by his will and they follow Christ Jesus.