God and the dilemma with unfalsifiability

[Astreja]

And if your god is too complex for you to fully understand as a human, because be honest here, how could you fully understand something that is omniscient, omnipresent, omnipotent as a mere animal?

If we can't understand something, it's the height of conceit to say that we know what it is.  In GC's faith-heavy scenario, it would be trivially easy for a malevolent being to give GC a handful of beneficial "signs" that predispose him to belief, and he would not be in a position to know the difference.