I have said this often to my friends and colleagues, but have never published it. The Englishman's post stimulated to me to write it in a comment over at his Castle, so I reproduce it here (with apologies for quoting myself);
Al Gore is the 21st Century's Karl Marx. His influential presentation of pseudo-scientific gobbledegook and its adoption as gospel truth by the gullible masses (of intellectuals) will kill millions of the real masses and ensure that hundreds of millions more live their whole lives in unnecessary poverty because of arrested economic development. His ideas justify ruthless centralisation of state power on "humanitarian" grounds and are therefore irresistibly attractive to politicians of a certain ilk, who will live high on the hog behind closed doors while their subject peoples suffer and die. Stupid mug punters will fall for the spiel because it's "for a better future." It will all collapse in chaos, with only Guardian journalists and British academics still believing in it when the scales have fallen from everyone else's eyes. The parallel is exact.
There. I have it off my chest. Now the anthropogenic climate change fanatics can use their sophisticated debating skills (i.e. calling names which draw parallels with neo-Nazis) on me. See if I care. History, I fear, will prove me right. I am sorry to disappoint Osama bin Laden, who no doubt covets the title, but Al Gore may just be the most dangerous man alive.