If these Greenies and Liberals are so worried about global warming doesn't that just suggest that they are out of tune with nature and clinically averse to change. So what if over time the Mississippi valley becomes the rain-forest and Alaska looks like Los Angeles? We're human beings. The best among us adapt and move on. The species that can adapt will thrive and the others won't.
I think you've answered your own question.
The Greenies and Liberals appear to disproportionately inhabit coastal areas and they don't represent the best among us so they are unlikely to adapt and move on. They would rather force the rest of us to adapt no matter what the cost.
Shalom.