So God has no impact on the universe (other than whispering messages to "Messengers")?God is not a material thing that exists in this world so there can be no observation or measurement.
Then your "Spirit Being" is indistinguishable from a non-existent thing in every measurable way.That is absolutely false since there can never be empirical evidence of a Spirit Being.
Which type of evidence are you suggesting we should use here?However, there is other kinds of evidence (see below).
To expect a kind of evidence that can never be procured is unreasonable.
It certainly is evidence, if the person represents God.
Empirical evidence is not the ONLY kind of evidence.
15 Types of Evidence and How to Use Them