I don’t think the warmists goal, at least for the near term, is global government. I think it is for governments (the god of the left) to have control over the means of production.
They also need us to be in an agreeable mindset, because we will die of poverty if we refuse to conform.
The Climate BS is everything to the left generally and the rats specifically.
Power, control and unlimited funding.
You have not been following the actions of the World Economic Forum and how, enabled by the Paris Climate Accord, the WEF has undermined sovereign control of central banks. They are imposing a Global standard of accounting which signatory parties to the Paris accord must adopt.
It amounts to global governance on the lines of the EU, Global Rule via a Global regulatory scheme.