Teaching the Scopes Trial

This fall semester, I will be teaching the second half of the US history survey for the first time. I am looking for a little advice on how to teach the Scopes Trial. Because what I really want to say is this: If you believe in creationism, you are an idiot. But somehow I don't think that will have a positive impact on my teaching evaluations. Usually I'm pretty good at making my points clear without coming down on those I disagree with, but this one is going to be hard.

Having had someone in my master's program who was a graduate of Bryan College in Dayton, TN does not help the matter.