Religious people are less intelligent than atheists

[Whateverist]

That's a reasonable stance. But for example, 
the Australian Aboriginal people were used as trackers, to hunt down wanted men. They could see, percieve and hear things that no white fellow could.
People can see, percieve and hear things that others simply cannot, and of course as the Bible puts it, they, and I include myself here, are willingly ignorant, they don't want to know, so they cannot know.
There are things God would have me realise that I don't, because I am limited, blind and lazy.

Perhaps it is the lazy belief that God has a plan and will provide and will reveal all when the time is right that is the actual result of your indolence (as opposed to what I bolded).