Forget Marxism and think Statism... AGW is the holy grail of Statism. By pushing the AGW agenda, any government can be grown to have unlimited power to control, regulate and tax every aspect of your life, including total control over your economic and social activities.
Because everything you do creates a carbon footprint, the Statists can, and will, argue that everything you do should be subject to some form of government intervention or oversight... It's for the good of the collective, saving the planet and all.
Knowing what you know about government, history, and the Statists who run things, does it still sound preposterous that they would be drooling over the prospect of pushing forward with AGW legislation? That they would do anything in their power to silence dissent? That they would carefully funnel government money into research that seeks to "prove" AGW?
If you still think it's preposterous then tell me... As a believer in AGW... On what grounds could you argue against granting government the power to control, tax, and regulate every aspect of your life since you honestly believe your actions are destroying the planet?
