"They" being the vast majority of published and practicing climate scientists.They create what is known by the name of Glittering Generalities. Read the definition. They will pretend to cite millions of scientists but in god knows only what experts they are in, if climate is their routine job and tell you actual climatologists are all wrong. But they are or course the sole arbiters of what is right or not.
If you'd like to see the stolen valor of the climate science field, check out the actual signatories to those anti-AGW "declarations".