You don't have to believe in The Bible to be a Christian.
Don't you? What other criterion are there? I thought that was a relatively prescriptive element of Christianity..
There's some Christians out there that err towards a potentially Gnostic path with ideas like "I don't believe in a book, I believe in a living god". They can still believe in Jesus and God while taking The Bible as a book of fables rather than as fully accurate accounts of history.
I regard those people the same way that I regard people who try to merge onto a highway at 40mph. Commit or fuck off.
Why derive 90% of your faith from this particular book, then, if you need to disregard most of the source material for it to be palatable? And the book itself doesn't really mince words about whether or not it's a collection of fables, it's pretty clear that it's supposed to be taken as "gospel".