I think the harmful «moral absolutism» is in fact coming from people with
irrational beliefs that mainstream climate science must be wrong because A) it runs
counter to their religious
beliefs (the «God wouldn't let us screw things up» camp, who like to say how we're too small and insignificant to actually affect Earth's climate) and / or B) it runs
counter to their political
beliefs (in that they think environmentalism = liberalism, and that liberalism = the evil commies) and / or C) it runs
counter to their fundamentalist
belief in the transcendant wisdom of unregulated markets («get government out of industry's way and everything will be allright!