I don't think the issue is IQ, it's the pride that one can have because of his intelligence that can hinder a person from seeing God. Obviously Jesus is no dummy, so intelligence is not bad just like having money is not bad. It's only when you think that are your salvation and your significance that you become truly a fool.

Wisdom looks at the brutal facts, and that I am a sinner, and I need help with the load I try to carry every day. Wisdom knows that if Jesus can lighten my load, than I am wise to trust in Him.

Matthew 11:25-30