The more real climate change becomes, the more fanciful and fantastic the deniers conspiracies get. There's a classic 70 year old book on this as a nice introduction

https://en.wikipedia.org/wiki/When_Prophecy_Fails

In climate change's case, they say "it doesn't exist" and then it happens. It's the same social mechanisms regardless.

They used to just call scientists alarmists, then fraudsters, and now that it's happening there's witchcraft, shadowy cabals, secret weapons, global conspiracies ... this isn't a self-correcting epistemology, it just goes further off the rails.

Check out how wildly complicated covid conspiracies have gotten now that their global government never came, people didn't all drop dead from the vaccine, and everything mostly returned to normal. They're spinning rube goldberg towers of fantastic tales to stay in their delusions.