Is christianity (the church) and the bible the oldest conspiracy and most successful?

im not saying i dont believe in god but what if jesus wasn't Devine but a great person? what if the bible is just a lie? God didn't write it so therefore it has to be flawed right? And please don't say that God was the inspiration behind the bible because a lot of famous people were inspirations for a lot of books and that doesn't mean its 100% accurate. The bible isn't even clear. is it literal or symbolic because if it was clear then people wouldn't have different views about it. Like if your gay will you go to hell.. the bible never says that so why do so many people believe that you will ( im not gay). So whose right... are we all right or very much wrong...