If God is God of all religions, as some profess, the church should just stay the religion it is ... for the fact that they're claiming it for their god means 'all gods are Not the same'!
To define it even more 'God in Heaven' doesn't have a religion, rather relationships with people via His only Son Jesus Christ - the only Mediator between God and humans - none other.

The fallen lying 'god of this world' is obviously behind this who is unworthy to be god of anything ... so he's god of 'nothing'.