"A skeptic should have occasional doubts about his own skepticism".<quoted text>
Faith is a weak appeal, and rationality is superior. The success of rational skepticism has been stunning in the understanding of nature and in political philosophy, which is evidence for its validity. By contrast, there are no analogous successes for faith based thought, which has been sterile. This is evidence against such a way of thinking.
But this is not surprising. There is nothing that cannot be believed or asserted by faith, including its opposite.
I'm not sure who is an idiot, but being unable to distinguish between these radically different ways of thinking would be a good start.