Are you saying that the Old Testament prophesies were doctored to match the events? Or are you saying the events were doctored to match the Old Testament prophecies? The Jews would never allow the Old Testament to be doctored. The New Testament fragments date to within the lifetimes of those eyewitnesses and as such could have been easily dismissed by other eyewitnesses as false. There are no contemporary documents that countered the New Testament testimonies. Josephus, a Jewish historian of the time period (not a Christian), did not dispute the testimonies.