For sure measurements are manipulated. But now there is also no market for them. In a proper oracle both shorts and longs can dispute measurements. Even though right now this problem has not been fully solved there are very promising approaches that will be tested an improved over the next years.

I think you are misrepresenting the view of climate maximalists. The earth has supported life for thousands of years. Living is not the problem. Also CO2 is not a poisson, but naturally appears and plays a crucial role in our ecosystem. According to the maximalists, the problem is burning fossil fuels disturbing the natural balance and leading to some level of runaway warming. No need to kill oneself (or others). Just changing technology and habits will do.