God explicitly is an entity supposedly existing outside our human space. He's not living inside our realm. How can human collect evidence for an entity not inside our realm?
It can't. But by taking those premises, you are making your God entirely undetectable, and therefore its very existence is a matter of faith as opposed to evidence.
The unavoidable result is that whatever sense or need there may be in believing in God's existence becomes an entirely aesthetical choice.
Actually, your premise is that discussions about God as you conceive him must be unsubstantial.That's a technical question. Now it all boils down to what do you mean by "evidence" in specific. Please compile a list first to see what can be considered as evidence, say, a video tape showing God, or God's DNA or what.
Now after you have a proposed list about what can be considered as evidence, than try to apply your list to a figure existed in our space first. Take Confucius (551 – 479 BC) as the first example, and please present your evidence that Confucius ever existed, or to reject his existence due to the lack of evidence.
Only after your definition and criteria used in addressing the existence of Confucius, then extend this as a standard to an entity outside our space......PLEASE!
Before this, discussions in this thread is completely unsubstantial!
We may pursue the tangent about Confucius if you want to, but it seems to be besides the point to me.