If I didn't believe their words I would think them fools for their collective claims, regardless of their literary skills. They must be liars or truth tellers, there is no grey area. I find their claims equal in boldness to the miracles God accomplished among Israel and if I did not believe the NT I would dismiss the OT on the same grounds.
As I told allend, this is a false dichotomy. They could be writing in a style that you misinterpret. Or, they could simply be wrong. Sincerely repeating something you believe to be true, but which is in fact incorrect, is not a lie. And none of this argues against their love for God and desire to do His will as they understand it.