Scriptural speaking. No one has 'observed' God but Jesus has made him known.
Jesus hasn't made God known to me. And if he did (unlikely, since Jesus died nearly 2,000 years ago), how would I know he is not lying? Or that I am not suffering from a delusion?
God is not changed physically because he is independent of physicality
Change in God instigated by physical beings?
Because God is not subject to time we are not aware of how and when his will is instigated.
You said God was unchanging. If he is unchanging, he couldn't create time and the Universe because that would involve God changing.
Also, he couldn't assume human form, because that is change and he couldn't live as a human because that involves constant change.
Neither could God answer prayer because that would involve him changing.
In terms of revelation it isn't as if he ever goes away
Well, he's not here now. He must have gone away.
.Even atheists can display reaction to God's presence and existence.
Please give an example of an atheist (or anybody else, for that matter) reacting to God's existence.
We should be careful to state that God cannot be changed.
If God answers prayer, then the above musty be false.
How it looks to us is perhaps another affair, but appeal to things not looking like they seem is a trope in Everyone's argument.
Nobody is appealing to things not looking
the same like they seem. We are pointing out that your assertion that God is unchanging is totally absurd if God has any agency whatsoever.