So what establishes the Bible's claims as truthful facts and evidence? Are older written documents about God. And newer ones. Why are those dismissed, but one in particular accepted?
Have you noticed that the Bible sometimes contain more than one version of the same story? I wouldn't say older/newer documents are dismissed or are of no value. Some have tremendous value and are incredibly interesting. (And some are merely funny, probably more satirical or the work of skeptics than anything else.)
The Bible would merely have existed as a history and artistic work of ancient Jews had it not been for Jesus of Nazareth, and writers (especially Matthew) who saw in the story of Jesus' life an overshadowing of Jewish history. For Matthew, all of Jewish history pointed to this man: To know the history of one was to know the history of the other.
If you have ever read the comparisons of Abraham Lincoln to John Kennedy, you will understand the type of thing that Matthew saw in his day with Jesus and the Jewish nation.
Running through the Bible we have stories of people who had an experience of God. I think many of us "put up" with all the other stuff in the Bible (i.e., laws and disputes) to hear and understand the experiences that people, down through the ages, had of God. Jewish scripture covers a few thousand years, and over these few thousand years, one might point out that relatively speaking, there are very few stories of experiences of God. What, an experience happens every thousand years or so? I do not think this is the case. I think people of every age have had experiences of God, but the ones that made it into print were those that were so incredible they became memorable.
The stories in print tell every man's story in one form or another. It tells of an experience of God others can relate to because of their own experience; or, they testify that an experience of God is indeed possible. I was just a tiny tyke when I got it into my little head I wanted to be one of those people who had an experience of God--and I got the idea from the Bible (the toddler version, of course). I don't think I'm unique in this. I think everyone dreams/pursues an experience/encounter with God, and that is why the Bible continues to be so well read. The parts that are not clear experiences of God are skimmed over, and do not receive the attention of the former.