Climate change denial is a perfect example of an 'intelligent' life causing mass extinction of other species and potentially precipitating its own extinction.
The hostile response my simple comment drew says it all.
For example calling it asinine when it is in fact entirely relevant to your post, and the climate change denial frequently expressed here on Stacker News.
Climate change deniers do rather deserve, in my opinion, all the scorn and rebuke that can be heaped upon them- they are the worst example of an allegedly intelligent life form and its selfishness and self destructive tendencies.
If I could I would exile them all to a very low lying atoll with one palm tree for shade and no way out.