I agree with your general premise, that climate justice is directly connected to anti-racism.
But there are a lot of reasons to be more optimistic than you are here:
1) Our current president gets it. He signed the largest pro-climate spending bill of any nation in the world ever. We need to do more faster, but it's not nothing. Biden is worth supporting.
2) By every reasonable metric we are making positive progress on the problem. We need to do more faster.
3) China's over production isn't for the West so it doesn't matter how we frame it here. They are over producing and sending the products around the world. The cost of oil is one of the biggest things keeping poor nations poor. Every kilowatt of renewable power helps to alleviate that disparity.
4) Every kilowatt of renewable power installed reduces the political power of those 50 people you cite (and they are certainly not all Americans).