As much as Vuk is saying some outrageous things in this thread, I do think that the language used to demonize people who challenge climate change is way over the top, and generally unfair.
I think we can admit that members of either sides can be fairly smug with regard to their opposite. But it can be rather tiresome for deniers (and "denier" is a rather flat and neutral term when you come to think about it) to make pretty ridiculous and/or irrelevant claims.

questioning climate change
Some people deny that climate change is anthropically-driven to any significant degree, despite much evidence to the contrary. Others deny outright that the climate even changes or can change. I think it's perfectly OK to point and laugh at those latter people.