All are via Christian Nightmares.
I often go back and forth on whether or not most people are complete idiots. I have an innate aversion to absolute conviction; if you are 100% sure about something and are getting all riled up about it, chances are that something is wrong with your thought process. If idiot preachers are so convinced of everyone else being idiots, why should I be immune from being similarly deluded?
I think that the answer is because I ask questions like that. Perhaps the essence of being an idiot is in not questioning your assumptions and thinking un-critically. Anyway, this is just a selection of stupid Christians: