RE not getting what climate change means:
If people could be communists into the 70's, through the thuggish Russian Revolution, horrific civil war, red terror, terror famines, great terror, Nazi-Soviet Pact, iron curtain, Hungarian revolution and Prague Spring, because they continued to -believe- in the dream of a worker's paradise and thus think that everything that discredited it was simply a capitalist lie, then it makes perfect sense that those whose ideologies are inconvenienced by certain scientific consenses will deny them. Ideology is a powerful force in shaping how people see reality, these days probably more so than religion in much of the world.