Is all religion just fiction? A very good question asked if the person asking is really seeking the truth on the issue and not just assuming one way or the other.. However, for many of us the study of all the multiple different religions that are out there would be tedious at best and imposible at worst. Since the topic is answered, so far, by those who question biblical accuracy.. in otherwords who believe it to be entirely fictional.. here are some topics to look up... (Too bad actual websites can't be placed here, it would make this a lot easier if they could be.) Archaological proofs of historical accuracies
1. Pithon bricks... In reference to the oppression of the children of Israel in Egypt.
4. George Smith, 1872 On the mentioned world wide flood
5. Doctor John Garstang, 1929 on what he discovered about the walls of Jericho
6. The writings of Josephus
Just for starters....
I find it hard to say that the bible is entirely fictitious when there are archaeologal proofs of its historical accuracy. But you be the judge.