Remember that the Lord said He would have spared Sodom if it had ten righteous people in it. All our blue cities, for all their blueness, also have large groups of God followers, and large groups of those followers preaching to their blue brethren.
Perhaps a child can see it because it is such an oversimplified way of seeing reality.
It is sort of like the communists, who see only oppressed and oppressors.
In my opinion, the world is much more complicated. Certainly there are people who wish to do bad things. Mostly, it is because they have weird and often false assumptions about the nature of reality.
Denying the existence of God is such an assumption.