I disagree, being wrong does not necessarily mean one lacks intelligence. I think it has more to do with a willingness to look up and see what is greater than oneself, and that is a heart thing more than an intelligence thing. Although Natural Theology offers very good intellectual arguments for God's existence, it seems to me that until one can wrap their heart around the concept of God, they will not have the courage to fully comprehend Him, and thus will invariably not attend to the evidence well enough to be convinced.
Unlike the reasonable agnostic, the atheist declares the intimate insight of another to be fallacious. And without knowing another’s insight, the atheist demands the explanation of something he is incapable of understanding.
I’m not saying the atheist is unintelligent. My point concerns the atheist’s argument is absolutely dependent on the intuition of another without ever having the means to understand it.