mP:
I think the Moses or the authors who created him did believe in magical snakes. lets not forget the copper snake Nehushatan.
Of course. The writer (around the sixth century BCE) borrowed themes from other myths.
Idolatry (magical snakes).
Divination (Umim & Thummim).
Human sacrifice (Jephthah's daughter).
The so-called 'pure' worship of the Israelites was formulated from 'pagan' beliefs they picked up along the way and adopted into their own culture.
As was the 'law code' that they also borrowed and adapted from the Babylonians.
The story is not about fairness, its about authority.
Exactly. The main point is to scare the common people (the 'worshippers') into respecting the authority of their 'God', and more importantly, their priests.