My worlds god structure and religions are kinda complicated, but I will give this a shot.
First, my world consists of a pantheon of gods. These gods emody all of the aspects of existence (I made the aspects of existence up): order, chaos, love, hate, etc etc.
The more primal the aspect...the more powerful the god. Thus, things like order and chaos...which are part of all other things, are the most powerful dieties in Heaven.
In Heaven, the gods work in harmony. There are no good gods, even the God of Good, and there are no evil gods, even the God of Evil. My gods are all neutral gods, bent on maintaining balance within the cosmos. These gods understand that should chaos envelope everything, eventually there would be nothing left to destroy.
So where do mortals fit in all of this? Well a mortals soul is needed as a kind of divine food for the gods. Saying that, a god can only collect on a soul if it is bound in love to that particular god. Thus, a man does not fear the God of Murder. He embraces it...conforms to it....worships it...and finally slays in the name of it...all the time being in total love with it. This mechanic works the same way for order, chaos, hate, love, murder, death, etc etc. Basicly, if the soul is not in love with their particular god...there is no soul for them to collect.
Now, this leaves man in a very precarious situation. First and foremost, I have told you he is food. Secondly, men have been led to believe by their god...that his god...is The One True God. Every other god...is simply an angelic aspect of The One True God.
So why would the gods allow this to exist? Uh...why would gods care? To be blunt the gods don't care - we are simply beetles to them. It is in their best interest to allow mortals to think what they want...and to follow their own paths. Why? Because this causes strife...and strife causes war...and war causes death...which leads to souls ascending to Heaven..where the gods can feed. At the same time...the gods do not want any fanatics running around, because too many deaths leads to annhiliation of entire species of mortals, which the gods feed off of.
Now, this is where it gets tricky. There is a real God. The Heaven that I have presented to you is a false Heaven. It is partially real in the sense that God allows it to exist. Those same gods...which made mortals...are angels that God made to help run existence. As an experiment, he blinked his fingers and created them without the knowledge that they do not really exist. And...now he has sent himself...in the form of a man who devoutly follows THEM...to bring the apocolypse to the false reality.
I tried my best to keep this short and sweet. It is very very complicated...and I actually have written a thirty page paper trying to describe it all.