The people of this world follow what is called "The Faith of the Seven". These gods represent different aspects of creation. They are:
- Khorne: god of war
- Tzenteech: god of change & ambition
- Nurgle: god of life & fertility
- Slaneesh: god of pleasure
- Nagash: god of death
- Sigmar: god of order
- The Star Child: god of machinery
These seven gods are ruled over by a higher god that doesn't interact with creation. He created the seven to interact with humans and govern the human world in his stead. Each nation follows this faith differently. Some worship each god equally, while others worship one above all others, but pay homage to their existence in some way.
A large Council made up of Representatives from all faiths keeps the peace between nations, irrespective of how they follow this religion. As a result, there have been no major wars between countries that attempt to slaughter unbelievers and convert survivors to their version. This Council have locations in every nation which are interconnected through a system of portals. These provide instantaneous travel between locations that only members of the Council can use.
In our world, the Abrahamic religions have had a complicated history with each other, despite them originating from the same God. Even sects within the same faiths have had conflict over minor details or interpretations, accusing each other of heresy and whatnot.
What would religions need to allow for interfaith councils like this to be successful?