Well, climate change denialists deliberately took over tactics, and even some spokespeople, from Big Tobacco. Beyond that, Massimo Pigliucci has much more to say, based on a one-day seminar on the issue he attended. Besides him, Brendan Nyhan was among participants, so it was a good one.
I've already dropped one comment there myself.
Money and/or power drives much of this. Climate denialism is funded by Big Oil. Antivaxxers are driven (outside of emotional parents) largely by the money, and the power of fame, of certain members of Hollywood. Genocide denials are driven most by the power of governments, and their money. The power of tithing-type donations is behind creationists.
They can buy the PR, the advertorial, the softball media interviews. We should be under no pretense that combating this will be easy. And, that’s not even counting the power of made-up minds engaged in group-reinforced motivated reasoning.
I suggest environmental friends, especially, drop over there and take a read.