It's a useless way to frame the issue. Environmentalism is an easy sell. It's much easier to get people to agree with socialism if you use climate change as part of your argument. But framing climate change as "first world vs third world" is just about the dumbest thing you can do because it puts everyone in the first world on the side of the corporations who are actively trying to downplay and obscure climate change.
If you make an actual, internationalist appeal for fighting climate change then you will have no problem getting people on your side. But framing the issue as "this one group of people is hogging all the resources and we need to stop them" will inevitably play into the hands of ecofascist rhetoric that views humanity as a virus on the earth.
Sorry for venting. Feel free to dunk on me in the comments
Thats why i said to varying degrees. Americans love to detach themselves from everything their government ever did and act as though they're just being taken along for the ride, when in reality a lot of us both actively and unknowingly enable and legitimize this government in many ways. How many people are ignoring the crisis and largely just want to go back to brunch? We really gonna act like Americans haven't been the most apathetic people over the past decades? Saying no one is responsible in any way for what their country does isn't conducive to anything useful. You can't do anything? You can organize opposition and build dissent. You can work to raise class consciousness. We can go grab guns and do something about it right?