I have read Charlotte's Web. I love that book! I knew it was fiction the first time I read it, but I also read some books about Encylopedia Brown the child detective around the same time, and those books don't have any talking animals at all and yet I suspect they were also fiction.
Alright, so you used your reasoning to determine those books were fiction from the outset. Well done.
But I dunno if E. B. White ever made claims of Charlotte's Web's unassailable veracity...that would be kind of funny if he did.
Why would it be more funny for E.B. White to make that claim than the authors of the bible? They are both books, right? They both appear on paper, with pages and ink, right?
Imagine for a moment you walked into a library and saw both "The Bible" and "Charlotte's Web" sitting on a table side by side, and you had never seen or heard about either one before. After reading each one, which section do you think a completely impartial and unbiased reader like yourself would put them back into? Fiction or non-fiction?
I hope he did, or well I would hope he did but I don't want E. B. White to be a liar, and I don't want Charlotte's Web to be true because that would be (as the werewolf says) terrifying.
I don't want the God of the bible to be true any more than I want Charlotte's Web to be true. I'm glad it's not. But that is no reason, in and of itself, to deny that it is. The fact is... You would call E.B. White a liar not because you are afraid of talking spiders, but because talking spiders are not real. I am just asking you to use that same reasoning in regard to the bible.
You've been told it's all true for a long time. Now others are telling you it's not. You owe it to yourself to explore that option, do you not?
Or when you read Charlotte's Web, did you subsequently go to a whywontspiderstalktome.com and begin constructing arguments against? 
Right! That would be nuts wouldn't it? Imagine how nutty it would be to try and explain to millions of people (who really believed spiders could talk) that the reason spiders don't talk is because talking spiders aren't real and the book is simply fiction! LOL. Those who really believe would probably give some other excuses like "spiders only talk when you can't see it" or "spiders will talk to you but only if you have faith that they talk" Nuts right?
Then try to imagine how nutty it would be to try and explain to millions of people (who really believe a personal God is real) that the reason people don't get their limbs back is because God isn't real and the book is simply fiction! LOL. Can you imagine how nutty that would be? Imagine the horror.
Welcome to our world.
Come to think of it...besides the Bible I never saw a book include talking animals and still claim to be true. Have you ever found such a book?
You could probably find a bunch of other religions that have talking animals, but I don't know what they are. Feel free to look it up. I don't have the time right now. Have to get the kids some dinner.
Protip: If you meet somebody like me who says "The Ultimate Everlasting Spirit Creator Of My Universe, Designer of Donkeys, Sovereign of Speech, High King over Humanity and Everything Else -- well, He wrote an ancient book by using a bunch of human writers, and this book tells me that one time, after a special man who verbally spoke with God but still kind of disobeyed him, was saved from a murderous angel by a donkey who could see angels...that donkey spoke." ... if you meet someone who says something like that, have the shrewdness to be honest with yourself and with that person by admitting that your eyebrows were raised by the beginning and middle of the sentence more than by the ending, and that if you had been able to sit through the beginning and the middle, the ending would probably not have pushed you over the edge. 
You see? Even YOU know it sounds nuts. The whole "everlasting spirit, talking donkey, angels" sentence sounds loony to you too, doesn't it? That's the reason you knew my eyebrow was up right? Because it sounds nuts. Yes deBew, I had my eyebrow raised early in that. I admit it without difficulty. That's true. It's the same reason
your eyebrow goes up when you hear about Xenu and the galactic empire... or Mohammed and the flying horse... or Zeus and Mt. Olympus. But wouldn't you also have an eyebrow raised if I were to start by making wild claims like yours about a God you don't believe in?
You give special consideration to the bible. Ask yourself why you do that? Ask yourself if you REALLY have good reasons to do that? Ask yourself... Do I give special consideration to the bible because someone told me to, or because logic and reason tell me to?
That voice in the back of your mind that giggles at the thought of Charlotte's Web being real is the voice you need to listen to more.