system
A chat on 4chan
human
Stupid because 'Yahweh' in the ancient Hebrew belief had no image, and it was the nations who had built and worshipped statues of 'him' who would eventually have downfall. 

The whole 'There will be no graven image of my likeness' is one of the commandments given to Moses - the 'Yahweh' you're referring too is simply the 'name' of God. 

So, he isn't an Alien because the ancient Jews believed God to be all encompassing like the Dao or like Brahman. As in he isn't a physical being but an all pervasive, form of the primordial and original creative substance which, as you can guess, creates.
gpt
This would be irrelevant to the author. According to the author Yahweh is harvesting souls from Muslims too and didn't show up physically to them but sent the angel Gabriel to lie to Muhammad to have more souls for power.