Gullibility is not unique to believers....I notice a lot of American atheists are quite gullible as well such as those who believe in the Jesus myth cookie cutter formula....aka just copy the same key facts and keep on applying it to gods from other religions.....the actual stories have nothing in common with those "facts," but given how many times I have seen them used, there must be plenty of idiots that believe it.
But if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus, His Son, purifies us from all sin.