I feel sorry for people who don't believe in God. They seem to think they are so intelligent looking to science for explanations.
It's a well-documented fact that religiosity is negatively correlated with intelligence, meaning that
ceterus paribus atheists
are smarter. But this doesn't necessarily mean that they have the correct view.
Anyway, no need to feel sorry: we're doing quite well for ourselves. Reserve your sympathy for your fellow coreligionists who are wallowing in their own shit, partially because their beliefs stunt scientific and civilizational development (e.g., the Middle East).
They say I can prove God doesn't exist with a scientific argument is to say you are all knowing yourself.
Not at all. It's entirely possible for one to proffer a 'scientific' (whatever that means) argument that 'disproves' (whatever that means) God and still think some aspect of the world remains to be explained. In fact, many scientists think this way.
The belief of God is seen in every nation since the beginning of human recorded history. One of the main reasons for generation nothing is not having a moral compass due not knowing God.
You're assuming that there's a single concept of 'God' that religious persons have believed in across the span of history. This is almost certainly false, meaning that while most people have believed in supernatural beings of one sort or another, it is likely most have not believed in God (where 'God' here denotes the specific concept you think accurately describes the creator of the universe).
It's a bad idea to turn the whole issue into a popularity contest, but if you do your concept of God almost certainly loses out.