Uh, you need to read the Captain's statement again. He clearly says the article presumes perfection in the Christian/Tea Partier. And, as both a Christian and a Tea Partier, I agree that neither are perfect.
As to his statement about liberals being dumb, often liberal arguments lack logic. Perhaps that is what he means. For instance, the large majority of taxes (as both a percentage and in raw dollars) are paid by what liberals refer to as "the rich". Still, liberals rage about the unfairness of the rich not paying their fair share. This is, quite simply, illogical.