Because in the US climate change is denied by approx. 35% of the general population and around 69% of the self identified republicans... so to that audience any

Because in the US climate change is denied by approx. 35% of the general population and around 69% of the self identified republicans... so to that audience any mention of climate change is an offense to their identity... and as we know from behavioral economics, people will ignore or downright reject any evidence that doesn't support their preconceived notions.