If you don't understand the actual reasons that the deniers exist, which have absolutely nothing to do with your approach to the science, then you haven't got a

If you don't understand the actual reasons that the deniers exist, which have absolutely nothing to do with your approach to the science, then you haven't got a hope of actually dealing with them. So what is the correct way of dealing with them? Insult them until they agree with you? Merely being correct may be good enough in science and technology fields, but it's not going to get you very far with the public; at that point it's a problem of marketing and PR. Would you say that "appearing secretive and refusing to disclose data" is a good PR move?