Could gods be built on collective altruism? Not likely due to God sized ego.
Some try, but it has always ended in failure (so far as we know)
See Greek, Roman and Hindu literature.
A god needs to be observed (meaning to exist in time) to be validated.
A God is by nature a narcissist. Only a narcissistic being could want other beings to worship at it’s feet. Which is by nature control.
The nature of a god is to make itself larger (human terms) by gathering more souls into it, to worship and be a part of it.
What is the difference between a god and a daemon?
There isn’t any difference.
A god is no different than you and I, it simply is larger by way of the souls it has collected and continues to collect.