from Moonbattery:

Until previously, the most malevolent ideology that had ever existed was Marxism. It has driven brutal regimes in previously civilized countries to kill over 100 million of their subjects and reduce many more to miserable existences. Communism has now been eclipsed by an ideology still more profoundly evil in that it pushes hatred of the human race to a more explicitly genocidal extreme. I refer to the Cult of Climatism: