The gist of the so called environmentalists is (factually, these really are their proposals when you look at their numbers): ok USA and EU, you have to urgently stop your emissions, even if that means total economic breakdown. China and specially India, it's ok you can continue your emissions, and increase then by even more than the all 1st world will cut theirs (even if they cut it to 0), that's just fine since your are entitled to it because you didn't do it in the past.
End result: a planet with even more emissions than today and a destroyed economy in the western world.
But somehow, this will save the planet according to people pushing this catastrophic scenario.
Sorry no, these people aren't pushing major climate action to save the planet, they are doing it because they think it's hip to push this idea that the Western way of life should be destroyed to give way to their political ideology.