A moral and ethical question for theists

[Ravenshire]

But how do you determine that one part is real while other parts aren't?!? Is it just acceptance of what's spoon fed to you or is there some actual process?

The stories in the OT sound very bizarre to me, and were written thousands of years ago when writing style could very possibly be different. So it would make sense to believe they are not historically accurate. Especially the story of Genesis, of which there is evidence that proves it's impossible it could have happened literally as it is written.

So, writing style and evidence to the contrary, but mostly writing style. Seems a strange litmus test of truthfulness to me.