Global Cooling in the 1970s turned out to be a boondoggle according to the data, so the very same anti-capitalists who tried to perpetrate it switched to Global Warming, seeing that the earth was in a natural warming cycle.
This is a great video of comments by various scientists and prominent individuals regarding man-made Global Warming and how the peer-review process failed.
Includes comments from:
Edward G Griffin
Lord Christopher Monckton
Dr. Ross McKitrick
A very good and detailed analysis of Climategate is here by John P. Costella: