I believe many of the "deniers/right-winger/etc" are actualy noticing how a belief an ACG creates a "give me your money we promise to do something to convince you to give us more money" effect. If actual solutions where put in place then questioning the science may not be the most effective tool to keep what we earned and not have it confiscated/taxed by Big Al, IPCC, USA, UN, etc to make them richer with no actual real world change to the problem.