What if scholars can prove beyond reasonable doubt that the Koran was not dictated by the Archangel Gabriel to the Prophet Mohammad during the 7th century, but rather was redacted by later writers drawing on a variety of extant Christian and Jewish sources? That would be the precise equivalent of proving that the Jesus Christ of the Gospels really was a composite of several individuals, some of whom lived a century or two apart. .."
It will be war! Muslims must supress any evidence that says the Koran has any other source than God and is perfect.
Break belief in the source of the Koran and how it was received and you break Islam. The more serious the evidence the more violent they will get.
But, really, how hard would they fight for 72 raisins?