Well ...
1) There is some evidence that most of the Bible was written in the 7th century CE, of course based on older tales.
2) Many of the Bible's prophecies simply were not fulfilled - or does the Lion eat straw today? Does Solomon's throne still exist? Did Damascus 'cease to be a city forever'?
3) In a large number of prophecies, there are always some that come true. In Zedekiah's day there were two prophets, Jeremiah who prophesied that Babylon will destroy Jerusalem, and Hananiah who prophesied that Babylon would not destroy Jerusalem. Since Babylon destroyed Jerusalem, our Bibles have the book of Jeremiah that mentions the false prophet Hananiah. If Babylon would not have destroyed Jerusalem, likely our Bibles would have a book of Hananiah that would mention the false prophet Jeremiah.