I agree it is about self interest (unfortunately we are all self interested to a degree) and it is the ultra conservatism raising it's ugly head. It is the major players that feed this fear in the interest of their own agendas: Nothing to do with facts. It is of course much easier to sling mud and rubbish than to undertake surveys. Did FenceFurniture comment that the deniers don't actually back their statements with research, although they do cherry pick. An aspect that has considerably assisted is that much of climate science is not clear clear cut. It is not a lineal progression and it allows various factions to take advantage of that when offering up their own reasons for change not happening.
One other thing I would point to ,and I believe many of us are guilty of this, certainly I am, and it is that if we form an opinion in the early stages of a discussion it is difficult to shake us from that belief. We seek to confirm our belief much more vigorously than we challenge our belief.
This is from WP's second edit:
"Since the late 1970s, oil companies have published research broadly in line with the standard views on global warming. Despite this, oil companies organized a climate change denial campaign to disseminate public disinformation for several decades, a strategy that has been compared to the organized denial of the hazards of tobacco smoking by the tobacco industry.[26][27][28]"
It appears we do not readily learn from the mistakes of the past and the behaviour of the major (think: influential) players.
Regards
Paul