We're not going to get China to agree to meaningfully lower emissions without doing proportionally much more ourselves. That's the reality.
Plus all those historical emissions are still around, heating up the planet, so we still bear responsibility for them. What you're advocating for is making the last guy to use the bathroom clean it up, when in fact many people have been befouling it for weeks before this guy even got there. And we have a pretty good idea of who those other people were and what they did. If the objective is a clean bathroom, I guarantee you pinning it on the last guy will not get it done.
At this point I put anyone who says "But what about China/India/Nigeria?" in the same camp as climate change deniers. It's just a different excuse to pass blame and guarantee nothing gets done, which is the point.
We either agree on practical solutions at scale, or we don't.
Social justice is another topic.
> Social justice is another topic
It's about practicality, not social justice. Put it bluntly: China (and India) won't accept a solution they feel is unfair. If you really want them to do something, fairness is not optional.
Go back to my analogy. You're saying "The bathroom doesn't care who cleans it, it just has to be done". But the people who would be doing the clean care very much and that ultimately determines if the bathroom is cleaned at all. Either you don't understand this basic point - which means you don't understand anything about human nature, and should therefore re-evaluate all of your opinions on public policy - or you're putting your head in the sand deliberately because you don't want to lift a finger yourself.
> We either agree on practical solutions at scale, or we don't.
So what are the practical solutions? Because telling China, or India "Stop industrializing right now!" so Americans can keep driving SUVs will simply not work.