[El Cid]

The 'cause' is not global warming, the 'cause' is for governments and bureaucracies to rob wealth from the people to fund their parasitic lifestyle. 'Global Warming' happened to be a convenient cause at the time. If not, it would have been something else (the Next Ice Age?). There will a Carbon Tax - data be damned.
The Government needs to eat and grow - so pay up you peasants.

[El Cid]

I should also add (to #9), that this propaganda would have been easily exposed by a functioning Press. Instead, our Media is supportive of large Socialist Governments and the confiscation and redistribution of wealth - so they have no problem in pushing the Global Warming meme, and covering their eyes and ears to contrary data. This, and on a personal level, most of them probably buy into a ‘Man bad, Mother Earth Good’ sort of ‘religion’.