They would like to prohibit dissenting views, on pain of persecution and preferably prosecution, maybe a little gratuitous torture if they were really able to express the desires of their lovingly self-righteous and totalitarian-flavoured hearts.
Most despise science and have never studied it. Doesn't stop them appealing to 'the science' in their little neo-Jacobin campaign.
Personally, I have no doubt that ripping every last accessible hydrocarbon deposit from the Earth will have disastrous consequences in tandem with the collapse that is inevitable as a result of runaway population growth.
Having respect for and having studied actual science, I know that nobody has an exact enough science of climate to predict where it will go, except that megacities make horrid heat islands.
Even there, Japan, including our heat-island capital, Tokyo, has been in the midst of very cool temperatures for August over about ten days, the maximum today was 22 celcius. Forecasts are for it to continue, not so low, but not typical high summer.
I hate the many recent summers extending into late September, or even October in some years, but am really disturbed by such cool weather in late August.
My own opinion is instability.