Mongabay: Prominent climate change denialist and past advisor to Margaret Thatcher, Viscount Christopher Monckton, has persisted in labeling protestors in Copenhagen ‘Hitler Youth’ despite little historical connection. The initial exchange between Monckton and climate change activists occurred when activists with the nonprofit group SustainUS and other organizations briefly gate-crashed a meeting of the global warming skeptical group Americans for Prosperity last week. Monckton later …