In fact, the fictitious book The Turner Diaries strongly foreshadows the event. It is not hard to imagine how someone would take it upon himself to make the prediction come true. Furthermore, militia groups across the nation are now claiming tht the bombing was conducted by the CIA to justify a campaign to take away the guns of hate group members and saying the predictions of a federal crackdown and ensuing war against the government are coming true. Few people would agree that the author of The Turner Diaries was a prophet who foresaw the Oklahoma bombing. A more reasonable assessment of the similarity between the fictional events in The Turner Diaries and current headlines is that Timothy McVeigh purposefully set out to make the predictions come true and his militia group supporters twisted the facts of the bombing to more closely fit their vision of the coming civil war.
Predictions have a tendency to be self-fulfilling.
It seems possible that Jesus purposefully fulfilled some of the Old Testament prophecies while he was living. Then, after he was killed, the apostles may have exaggerated or distorted accounts of Jesus' life to fit more of the predictions. By way of a similar analogy, suppose I wrote a book and it turned out that the main points of the plot were the same as another book that had been written many years earlier. The reasonable conclusion would be that I had somehow known about the earlier work and plagiarized, not that I had arrived at all the major points of the plot independently. Similarly, the fact that Jesus knew about the ancient prophecies that his life paralleled seems highly suspicious and points toward the conclusion that Jesus fulfilled the prophecies by design.