exercise Free Will? Can you explain how free will is still an option if 'true prophecies' are actually made, thousands of years in advance of the event?
Free will involves personal moral decisions. It doesn't mean we have control over the facts of history. There are no prophecies foretelling my personal decisons of free will.
Prophecy may not disprove the concept of free will; a prophecy only foretells a certain period of time, set of actions, and consequences. Free choices might still be possible outside those prophesied events.
The idea of an omniscient deity IS mutually exclusive to free will, however, as omniscience is not foreknowledge of a specific series of events, but of every action and consequence that will ever occur (of everything, in fact).
If God is real and makes a prophecy thousands of years in advance which then comes true as prophesied, it would appear that this God does not require his creation, the Human race, to actually exercise their free will for him to see how they decide, for him to then use that discovered knowledge to "know" what the ultimate outcome of that expression of Free Will would be. Logically and hypothetically, He, God, would be able to make accurate prophecies because he already knows in advance, the future results produced by the future actions of his creation. That begs the question " Why Give Free Will to humans when you, God, already know in advance how everyone of your created souls will choose?" Since the existence of Free Will appears to serve the purpose of allowing God to decide who gets into Heaven based on the way they use their Free Will to make good or bad choices, it makes no sense that a God who can prophecy accurately in advance because he knows everything, would need to have such a measure to test his Created products. It therefore follows that the concept of Free Will is human in origin, since it can only be useful to a God who is NOT All-powerful, who has no fore-knowledge of how or what his creation will choose in the exercise and application of this Free Will. This kind of God is NOT the one described in the Bible. Thus the Bible says that the God of the Bible knows EVERYTHING, but then we see that this God needs to have his creation tested by the way they use their Free Will to see who he will allow into Heaven or consign to Hell. These two concepts cannot exist together in the same Being if he is to be believed as one who knows EVERYTHING, and leads to the conclusion that the principle of Free Will was designed only by the unknowing human mind, which is comfortable with the concept of testing to discover unknown facts. This then leads to the unerring conclusion that a God who needs the human race to use Free Will cannot exist, and, even more devastatingly revealing is the fact that the concept of Free Will exists at all in the doctrines of religions, which is fatal evidence that the God described as requiring it, is non-existent, and is as much a creation of the same human mind that subsequently created the idea of Free Will as being a Gift from this God. So to answer your question truthfully, the existence of Bible Prophecies proves that the men who wrote those prophecies did not conceive their presence in the Bible would be destructive to the claim that an All-knowing God exists and gave man Free Will. The only true thing about the claims of God, Prophecy, and Free Will, is that man does indeed have Free Will to exercise in the business of his daily existence, but there is NO God for it to have come from, and so it is a natural part of his make up. As humans we HAVE to make choices every minute of every day about how best to act in the interest of staying alive and living as safe and comfortable as we can. The ability to make those choices is what humans have mistakenly attributed as being a gift from some supernatural being, when it is rather something essentially very basic to our very existence. Our Free Will is not completely free either and is very much subject to the judgement of our fellow humans who will apply severe restraints to the use of anyone's "Free Will" where it is likely to harm the well-being of others. The Bible creators sought to use the concept of Free Will to high-light the so-called goodness of their paper God, but instead created the evidence of their own errant thinking processes, and ultimate proof of the fallacy of their claims.