Saying that Atheist is smarter than everyone else who believe in God is just ridiculous.
Why don't you explain then why everything is precisely measured and placed in the right location? is it all by chance?
Nature you say? The nature your talking about is in other words called a God who determined everything.
What if God really exist and you just can't see it? and the day he ask you that question; why didn't you believe in me, what would you say?