How atheists can enjoy religion

[Ahriman]

So borrowing a credit fact from another culture is very legal for me.

I think you misunderstood me.  As I see it, the Qur'an authors borrowed already-existing information (e.g. the known existence of the sun, moon and planets.)

Fact:  The sun, moon and planets exist.  I've observed all three myself (only planets in the solar system I haven't observed are Uranus and Neptune - I've seen all the others.)

Unsupported assertion:  A god created the sun, moon and planets.

This might be a little abstract, but I would argue all words/concepts are unsupported assertions, until they are argued for. So if you're willing to argue for the idea that there are planets, stars, moons, etc., then those things become real. Likewise, if you're willing to argue for the idea that there are gods, who created planets, stars, moons, etc., then gods become real.