Absolutely. The theories they proffer have nothing to back them up and fly in the face of historical data. I mean if that 1 C change from CO2 could get us to a tipping point, why have we not hit it already and gone into a catastrophic warming death spiral? I mean the annual temperature variations year to year can be appreciably greater than 1 degree.
The theories are complete bunk, and only a self deluded computer modeller or someone who’s funding 100% relies upon panicking people would sell such crap.
Because there are a number of very strong negative feedbacks such as the increase in the water cycle, concentrated convection and subsidence, increased air exchanges between the tropics and poles and others (clouds are a possibility). In any case the weather will cause a few tenths fluctuation in global average temperature in a week or two. Or cause a 5C fluctuation in some localized area, not balanced by an "opposite" fluctuation elsewhere. You are absolutely correct, there is no such thing as a tipping point, quite the opposite.