I can go on and on about the countries that are emitting less than the US.
People and animals live in areas that are liveable. So countries near the equator and fertile countries will always be more populous. So how else do you propose we compare countries? Which are themselves mostly arbitrary lines as far as the earth is concerned - so why chunk by countries? It has to be per person right?
I am with you on this one. I have seen people making similar arguments about plastic dumped in the oceans where at least until about a decade ago China was well ahead of every nation. The oceans don't care about the per capita plastic polluting them.
The earth isn't a person. I think it seems valid to consider the harm and or benefits being caused on a per person basis. Why should an individual in the US be allowed to release more CO2 emissions than an individual in China?