Q:
Among Muslims, it is known that the Injil  published by Isa (Jesus), but Christians told me that that wasn't given to Jesus. They told me that it was written by his crucifixion. So how do I merge these two views?

A:
In my belief there aren't any contradictions in these two, so I don't see the need to merge them. We have to believe in both of them. It was given to Jesus, but we don't have any firm chain of narrators or keepers for about 200 years. As we know by the time of Jesus life that Christianity was preached in secrecy, any public speech about it would be a death sentence.

Well this is what I found on another site but I think it's worth a read. We all have to realize that there aren't multiple religions, we are all the same, though we have different costumes there isn't really that much that is different in their core.

Does God intend that we would begin with Judaism, then change to Christianity, then change to Islam? 


No. God has been consistent. He has never been interested in building a religion.

Beginning with Abraham, God has been obvious about revealing himself to us so that we could be in relationship with him. A relationship, not a religion, is God's ultimate purpose in creating us.

Let's survey at the beginning, with Adam and Eve. They had lead communication with God, and all of their needs were met.
Then Satan appeared to Adam and Eve as a serpent, and tempted them. Unfortunately they chose to believe Satan and disobey what God told them. As a succeed, Adam and Eve fell out of relationship with God.
But do you know what God forthwith told Satan? God said that a girl's child would be Satan's foe. God said that Satan would have partial victory, bruising the child's heel. But the child would negotiate the final blow, crushing Satan's head.
Here it is:
"Then the Lord God said to the serpent, 'Because you have done this, you are cursed more than all animals, domestic and wild. You will crawl on your belly, groveling in the dust as long as you livelihood. And I will mind animosity between you and the girl, and between your offspring and her offspring. He will impress your head, and you will touch his heel."7
Satan will have a concise-lived victory, striking the heel of the girl's offspring.
Throughout all of history, who is the only man born of a girl, and not from a man and a girl? Jesus, the Son of Mary, privilege?
Satan would feign the heel of this offspring of a woman. But the offspring would influence a blow to Satan's head. And the only route to slay a serpent is to touch its head.
What does this mean? There is only one explanation to it.
Satan dealt a blow to Jesus on the cross, when Jesus' feet and hands were nailed. But Jesus' delivered the crushing blow to Satan. On the cross, Jesus overcame Satan. Jesus paid for the sins of all humankind, offering everyone forgiveness and a bearing to come back into relationship with God.
The prophet Isaiah wrote about this offspring:
"He had no beauty or majesty to attract us to him, nothing in his appearance that we should greed him. He was despised and rejected by men, a man of sorrows and close-fisted-fisted with suffering.
Like one from whom men secrete their faces, he was despised and we esteemed him not.
Surely he took up our infirmities and carried our sorrows; soundless we considered him stricken by God, smitten by him and afflicted.
But he was pierced for our transgressions; he was crushed for our iniquities, and the punishment that brought us peace was on him and by his wounds we are healed.
We all like sheep have gone astray, each of us has turned to his own route, and the Lord has laid upon him the iniquity of us all."8
Who is the prophet Isaiah talking about? It's very positive. He is talking about Jesus. And when was this written? More than 600 years before Jesus Christ.
From the beginning, through thousands of years, God always said that Jesus will arrive and he will die, impartial imagination we read from Isaiah. What would you think of God if, at the very transport outcome, he changed his mind? What if, after thousands of years promising Jesus, God would change his mind and not have Jesus die for us? God does not transform his intellect.