I’m not sure the motives are red. People are making billions and billions off this. A bug motive is greed.
And what's in it for the liberal elite? Money and greed. If they accomplish their goal of destroying the capitalist system and replacing it with their preferred marxist socialist system, they are the only ones to benefit financially from socialism and communism. They could care less about the little people or the climate or the planet. They're in it for the wealth redistribution factor whereby they take from the population in order to line their own pockets.
David Horowitz has put it best, "The issue [climate change] with the left is never the issue. The issue is always the [socialist] revolution."