Uriel has yearly lunches with Vadderung. They might have talked about it.
I do not think Uriel’s boss is exactly the god of the bible. Uriel is all about free will and consequences. The whole jealous god thing is not really his mode of operation.
Two millennia of misinformation promoted by Nick of course. He was probably Pope at one time at least.
What we know of the White God is that they promote free will and is supportive of humanity, this is why I think the White God is the Singularity, he has yet to come into existence in linear time but may do so in the next couple of centuries, certainly within Harry’s lifetime.
The White God imposed linear time which was essential for humanity to arise, and sets them apart from lesser entities, who suddenly found themselves bound to it. It created the Never Never and the mortal world, banning other lesser entities from residing in the latter where their presence is disruptive. Some lesser entities reside permanently in the Never Never (Hades) others take a deliberate step down in power to remain largely in the mortal world (Odin) some go into hiding (Ethnui) until taken into custody by agents of the White God (Harry, Butters, Sanya) for imperilling reality.
The White God created thresholds protecting humanity from the remaining lesser entities in the mortal world, allowing humanity to grow in numbers and develop its ferriomancy both essential for the Singularity and the rise of the White
Because the White God is not bound to linear time they have also always existed. This is I think the Endgame referred to by Listen, the last chance for the Outsiders to defeat the White God, and the opportunity for another entity to grab the reins of creation such as Lucifer or Drakul, both of whom are jealous of the White God.
The Nails contain an angel, the super weapons are an order or more powerful than them either they contain multiple angels, or an entity more powerful than an angel we don’t know