All ideas start the a large dose of scepticism, shortcomings will be pointed out, these will be analysed and the results will make or break the idea. after several rounds you get to the point where the evidence is so strong that the skeptics are only able to maintain their stance by becoming denialists; simply refusing to look through the telescope, for the fear they might see the stars
With climate change and global warning squarely met that point last year when the search the Koch brothers funded research, research designed to address all of the concerns that the sceptics had in the existing models and research, reported that they had found the same result. that global warming is real and humans are responsible.
Those that maintain their view that global warming is not happening are simply denalists following a self interested corporate agenda of the oil industry. no different to what happened with tobacco and asbestos. its not that surprising that the koch brothers have maintained their view, ignored their own data and terminated their involvement ini its further development. Personally i am surprised they funded to begin with as usually denalists have the sense not to do research, as the risk of getting the wrong answer is just too high.