I haven't read the thread, but if it hasn't already been pointed out, this comment in the OP repeats a common misconception that people are in denial.
Also, why the general population is still, despite all they have been told about these problems, in almost total denial about the consequences.
Most people fully accept that climate change is caused by human activity and needs to be urgently tackled, as this opinion survey in 2007 shows :
Only 3% in Britain feel that no action is necessary, and even in the US where the petroleum industry is hugely powerful and influential, only 6% say that no action is needed.
The problem is that the conspiracy theorists who believe that the whole climate change argument is a devious plot by marxists in the federal government or New Labour socialists, to undermine capitalism and tax us more, are extremely vocal.
Plus media organisations such as the BBC in the name of 'balance' often give conspiracy theorists/denialists equal coverage of their crackpot ideas.
As a consequence, many people are misled into believing there is widespread opposition to the self-evident truth that human activity by pumping CO2 into our atmosphere, is affecting the delicate balance which dictates the Earth's climatic conditions.