It seems pretty self evident that China would not be in favor of military action to enforce climate goals. GP's point was that still developing nations are going to continue producing CO2 regardless of what electric grids look in OECD nations.
What matters for the climate is absolute emissions, not the some underlying fairness metric. Chinese CO2 emissions dwarf ours. Further: China's CO2 emissions are rising. Ours peaked in 2008, and are today lower than they were in 1990.
What matters is per capita emissions, not some arbitrary measure based on how borders happen to have been drawn hundreds of years ago. A small country like Kuwait, or the US (relative to China) cant just pretend not to be part of the problem, because they can point at some region with more people that consequently have larger emissions.
And historical emissions are relevant, since the carbon budget relates to the total amount of co2 in the air above pre-industrial levels. That co2 budget was largely "spent" by the US.
