Belief is used twice in this sentence and yet I am to pretend it doesn't exist.
No. You are to realize that a lack of belief is no belief.
If you have no scientific knowledge and you grew up in the jungle and say no animals other than a ones you know exist. This is still a belief.
Are you proposing that God only exists for some people then?
Because I don't see how the parallel would apply otherwise. Aren't we all supposed to be living in the same world and seeing the same evidence (or lack thereof) of God's existence?
If you have never had any knowledge of the moon because you lived in a cave all your life. The word for moon is not in you vocabulary. Someone comes in your cave and tells you the moon exists you refuse to leave your cave an see it. It is still a belief.
That is not a very good parallel. Leaving the cave to see the moon is possible. Objective evidence of God's existence, by constrast, is lacking.
Just because an individual is unaware of something does not exclude them from belief
It does, when said belief is about an abstract concept that they have never met or imagined.
but the contrary to exclude anything even flying pink elephants one must prove there non-existance or they believe they don't exist simply because they haven't observed them in their limited existance.
Or they may simply say that they don't know of the existence of any flying pink elephants.