Orac, of Respectful Insolence, has a post about how global warming wasn’t "invented" by Al Gore, contrary to what many global warming deniers seem to think. However, the part I find especially interesting in his piece is his explanation of why denialists tend to attack people.
Here’s an excerpt:
If there’s one characteristic of denialists of all stripes, it’s that they have a strong tendency to personalize their dislike of their particular bete noir science.
The reason, of course, is that cranks can’t attack the science using good science and, of course, it’s far easier to attack a person than well-supported science. After all, all people have flaws that can be ridiculed or used as the basis of ad hominem attacks.
Like Orac, I’ve seen this from global warming deniers, anti-vaxxers, religious fundamentalists, and anti-evolution creationists. Whatever motivates them in their denial, it seems they share this common tactic of attacking the messenger.