It will now be thoroughly impossible for him to ever refer to Christians as “stupid” without looking ridiculous.
That is pretty bigoted of him, as there isn’t any proof that faith in the supernatural makes a person any less skilled to deal with the technical affairs of earthly existence. Even in the most hotly disputed area — many conventional evolutionary theory nonbelievers can regurgitate the theory with the “best” of them, but beg to disagree with it as a sufficient explanation for why there is life on earth or how it got where it is.
Is the converse also valid?