Well, the proof as you say has to be the indicative: How come than they are not Christians?
Simple. They are misled.
Stand up to a podium and have a few million people say your a terrific guy that can do no wrong and must be God's messenger, and as the charismatic Kareshes/Jone's of the world will attest, it's very unresistable to let it go to your head.
Mohammed was drawn by his own ego to establish himself as the leader of his own religion, even though he knew Jesus was the Son of God. You will note the Koran just falls short of saying this. The oversight was deliberate and has a purpose in that it would have put a clincher on Mohammed's career, therefore the oversight was to "make room" for Mohammed's ambitions. If it did admit it, everyone would be asking him why he didn't become a Christian cleric or evangelist. The Koran reads like a document that wishes to be politically correct, not making any waves with Jesus , but at the same time not making full admition by giving Jesus his full recognition has God..
Courtesy: http://devoted.to/truth
[FONT=ARIAL,HELVETICA,SANS-SERIF]In Oud Emrom 5-45, Jesus is referred to as, "the greatest above all in this world and the world to come." [/FONT]
[FONT=ARIAL,HELVETICA,SANS-SERIF]S-5-46: "And, in their footsteps, we sent Jesus, the son of Mary, confirming the law that had come before him. We sent him the gospel. Therein was guidance and light, and confirmation of the law that had come before him. A guidance and an admonition to those who fear God." [/FONT]
[FONT=ARIAL,HELVETICA,SANS-SERIF]Jesus came to confirm the law. The prophesies were to be confirmed by Jesus (Matthew 5:17, Luke 24:44). The Koran is saying that the prophesy of Jesus was foretold, and that his coming was a confirmation of the law which was written prior to his existence. This is the first proof of divinity. [/FONT]So we have it here in the Koran as a logical summation, and some would say even pleads to the reader to come to no other conclusion.
Who can be greater than the greatest IN THE WORLD TO COME? Ans: God
AndyF