I can’t get past the whole issue of planet extinction to begin with. The planet has been far warmer. It has been far colder. It has had both far more and far less CO2 in the atmosphere. So why is it assumed that if the planet warms, that is a bad thing. That seems to be the biggest flaw in their argument. They have not proved the planet can’t be a few degrees warmer.
As I see it. The planet warming allows the planet to feed far more people because vast lands in Russia and Canada become available for farming. Plants grow wild. Animals live on plants. People love the warmer weather. Its a win, win, win.
It may be true that those who own beach front property will loose it in 2 hundred years. But warmer air holds more water. Deserts will shrink, tundra will become usable. The earth will grow so much food that everyone and every species will thrive. And of course we have been here before.
If you want to worry about something. Our demise as a planet will assuredly happen by a rock hurling through space. One clearly hit mars. And eventually, maybe a billion years from now. One will hit us too. That is our end. While it is not likely to come tomorrow. Mathematically it will happen. And we have until then to figure out where to go. Or how to stop it.
And by the way. The earth itself is not our only worry. If the moon is hit, we are in as much trouble. And if another planet is hit or even glanced, it will surely cause havoc on our stable solar system. This little global warming scam is nothing compared to the real threat.
The last time I looked the models had several positive feedback loops and no negative feedback loops. Also in the models is a large gain stage. This makes the models unstable and guarantee that they report something bad will happen. At that point I stopped wasting my time with the models as they were just gigo.
As you have grasped, if the earth actually behaved like the models, it would have already found that instability sometime in the past.