They just don't get it at WUWT. It's the pace of change that's the problem.

Deniers like to claim they aren't stupid and they aren't ignorant. I can't say what happens in the rest of their lives, but those who deny climate science, when it comes to climate science, are either stupid, or ignorant or knowingly telling lies. There is no middle ground.

There's an example again today at WUWT (archived here). Again it's from Eric Worrall. He wonders why, if global warming is threatening the food chain, it didn't threaten it during the Cretaceous period. You don't believe that anyone could be so foolish? It's true. Eric wrote:

The obvious question – why didn’t this hypothesised collapse occur during previous epochs with high CO2 levels, such as the Cretaceous Age? According to Wikipedia, the Cretaceous age enjoyed CO2 levels of around 1700ppm. Yet the Cretaceous was also the age of the Dinosaurs – the period was characterised by large tropical jungles, shallow warm seas, and a vast abundance of life, both marine and terrestrial. I suggest it takes a pretty robust food chain to support a predator like the Tyrannosaurus Rex.

It's as if he's never heard of any of the great extinction events, like the massive Permian Triassic events, which in part were the result of rapid greenhouse warming.