That's not what the article says. In the article, US is second biggest co2 producer. if US had 0 emissions, that would make a big difference! Obviously, if China had 0 emissions, it would make a bigger difference, but India is 4th in this list, so shifting blame to China and India seems wrong and seeing their emissions and say "US having zero emissions wouldn't make a difference" seems defeatist.
Also, don't think this is a "they do, so I can also do" but rather what can we/you do to improve whatever would help.
> The problem is that many ideas for curbing climate change will destroy the economy
Seems if your economy is depending on screwing the planet, probably it would be best for everyone if it did get destroyed. On one hand: working economy / broken planet and on the other hand: broken economy / working planet. I sure know what I would prefer.