I'm not claiming that any theory is fact,
That's great. If I was pointing at your personal claims, I shouldn't have been, and didn't really mean to be.
but the theory you're talking about (the big bang) doesn't use the scientific method, as it can't be observed. But if you track the speed and direction of matter in space, it is moving outwards from a single point. If you care to understand why they think that, you should watch the Cosmos series by Neil Degrasse Tyson, or a Universe From Nothing by Lawrence Krauss. Anyways, it remains a theory and it aligns with observable evidence today, but it's not fact.
True about the Big Bang not being scientific method. Is it science? The line between what some people call science, and whatever else they might call it, can be very hazy at times. The point wasn't to focus on the Big Bang. The point was to focus on the fiction side of science.
How are you coming up with the "fact" that God exist? What are the facts?
This is not an easy subject. First, the scientific fact that God exists as explained by three of the fundamental laws of science, doesn't have anything to do with any of the religions on earth. At least not from the scientific standpoint.
The three chunks of scientific law are:
1. Cause and effect (action and reaction);
2. Complex universe;
3. Entropy throughout the universe.
I am not going to make a big thing out of this. I am not going to go and dig up all kinds of scientific teaching that shows links to it or other reference. I will simply explain it somewhat. My wording may not be the best, but you will get the idea. Once you have the idea, if you want to prove or disprove it to yourself, start researching.
Entropy is all-pervading. Everything slows down, wears out, falls apart, oxidizes, dies, etc. Everything that is new and fresh becomes that way at the expense of something else wearing out. We see nothing in the universe that explains for a fact, the reverse of entropy... how things could exist without entropy having turned them to dust long ago.
There is great complexity in the universe. Perhaps the mind of mankind is the greatest complexity of the universe. Perhaps it is man's brain. Whatever is greatest, these or something else, the facts of our thinking, our emotions, our consciousness, our personal identity... the facts that these exist show fantastically great complexity in the universe.
Everything that we know of operates by cause and effect, action and reaction. Newton even made it into his Third Law. Because of this, from a pure science standpoint, everything in all the complexity, all our thinking and free will, has been caused by something causing it all to happen. Essentially, we don't have any free will. The thing that we call free will is a product of countless chemical and bio-electric actions and reactions in our bodies, and from without. If there is something outside of action and reaction (cause and effect), science has not found it. The very interesting point about cause and effect is that there is no pure random. The thing that we call "random" is simply our inability to see the multitudes of causes behind something. Everything that we know operates by cause and effect.
Cause and effect over the thousands of years has maintained a tremendous amount of complexity in things in the face of entropy. This shows us the fact that the mind of mankind was far more able in the past before entropy had the time to tear down its abilities. Another thing this shows is that everything in the whole universe is "pre-programmed," by Whatever started cause and effect. Cause and effect must have had a start. Otherwise entropy would have neutralized everything by now.
A person who is a billiards/pool player is good if he can, knowingly, set a string of five balls into action, the fifth going into a predetermined pocket. He taps the first ball, which hits the second, which knocks the third, which rolls into the fourth, which bumps the fifth into the pocket. Consider how great the Great First Cause must have been to have started all the cause-and-effect actions that continue to maintain this great amount of universal complexity in the face of all-pervading entropy.
Because the mind and brain of man are as complex as they are, the mind of the Great First Cause must be complex beyond understanding. Why? Because greater does not come from lesser. Entropy keeps it from happening. The complexity of the Great First Cause makes It fit the dictionary definition of the word "God."
Not only does God exist, but also, God is so extremely great beyond us that we are essentially less than nothing when compared with God.
And if we are going to be religious, why is Christianity the religion of choice? Does it have something to do with being raised Christian? Have you taken as deep a look into other religions and consciously made a decision? Is your current perspective one that has been conditioned? I'm not trying to be offensive, but I'm asking rhetorically for you to think about it. There is a VERY high correlation of people selecting the religion that is dominant in their childhood environment. Meaning, if you were born in Indonesia, would Jesus still be your God? No, it wouldn't. You'd be conditioned to be Muslim, unless you lived in Bali, and then you'd be Hindu.
Because of our remoteness, because of our inability to see the complexity in cause and effect, we use probability. Christianity is the religion of choice because of the odds it has overcome to be the religion that it is.
In the way that Christianity came into existence, the nation of Israel, their activities, the way they made the Bible record, the prophesies that exist, have been fulfilled, and are being fulfilled, the fact that the true Hebrew Bible has changed little over the ages even though it was copied by many scribes over and over, the numbers of ancient copies and fragments, and a lot more things, show that the Christian religion as it stands today couldn't exist. Since it couldn't exist, yet it is here, shows that there is more to it than simply something mankind could do. The Christian religion is a God production.
Do your own research into it.
How is science fictional? When you get sick, do you go to a doctor or do you pray to God? You use all the technology that has been discovered by scientists, even the fact that you and I can communicate over electrical signals shows where science is at. Science sends rockets into orbit dude...how is it fictional if it works?
Not everything about science is fictional. God made science - combinations of complex actions and reactions, some of which we can see, other of which we can't see. But the scientific theories are fictions as far as we know. Until such a time that we prove them to be fact, they are fiction... and they stand right alongside science fact, so that often we do not know where the division lies.