I have a noble god in my world that is answering prayers, guiding his believers and bestowing divine powers onto selected priests.
Now his church is fragmented ininto several factions on ideological and political grounds to the extent of sporadic armed warfare between factions. Still, each faction is somehow aligned with the god's dogma and receives its share of divine grace and miracles.
Many of the priests are politicians, managers or simply shepherds to the flock and are not especially connected to the divine nor receiving any spiritual powers while still holding significant material power.
How to explain how such a structure could tolerate the presence and elevation of an impostor that follows and gets his powers from another divine beginbeing dedicated to duplicity?
As such an infiltrator moves up in the hierarchy he would encounter more and more political enemies and gifted individuals who would like to unmask him. If somebody becomes suspicious he could (or have someone who can) use a divine hotline to pick apart the impostor's cover.
The Noble god would know that the individual in question is tapping into divine power and that the power does not come from the god. So it is hard to explain how the god would not put two and two together.
I'm looking for an explanation how the impostor could remain unnoticed - or what would motivate the "host" god to let it slide and not alert his priests?
The duplicity god is not against observing "host" god rites but demands to regularly cause some mischief to remain in his graces.