Rachel Held-Evans joins you in questioning biblical truth. She doesn't believe Jonah spent three days in the belly of a whale [he didn't -- it was a fish], saying he would have been dissolved by the whatever's stomach acids and no oxygen could have gotten to the man. This is typical of those who deny the Bible. They don't bother to consider, probably because they can't conceive of a God who is able to provide for us in any circumstance, that the things He says He did, He did. In reality.
Held-Evans, unfortunately, represents the "new Christian" where it is all right to question the inerrancy of Scripture and denigrate the word of God and thus relegate it, probably unintentionally, to second-rate fiction. We as the older generation have failed in translating His perfect providence into practical proofs that He truly is able to do anything He says He can, and that the historical events recorded in the Bible are entirely within His purview. In fact, not only that, but He did them, just as they are recorded.
It is truly sad that young people today can't grasp of that kind of power, that kind of glory, found in a God who has no need of us, but chooses to give us the desire to relate to Him so He can express His love to us in as many ways as He can possibly manifest it.