Loads of prophetic type things have been written by absolute madmen in the past.

Who's to say that the bible wasn't written by a prohphetic madman in the past? People were less well informed than people are today, and for someone from that time to discern between a madman and regular person, Especially if said madman was a sociopath would be nigh impossible.

So who's to say that the bible isn't just a bunch of madness written by a mentally ill person ages ago?