Another species of anti-Gore comments that I've seen, question whether 'comfortable activism' of the kind exemplified by Gore (read: making documentaries, public frowning) really correlate with the heroic suffering and life-long work one imagines to be a pre-req for the Peace Prize. It's possible some of the suspicions you identify as anti-ecological are generated by this: to the extent that Gore is a shady racehorse, he transfers some of that shadiness to the (entirely un-shady) cause he purports to represent.

In my view, this whole debacle merely underscores the depth of humanity's current Superman fixation, and our childish insistance that heroes will come clean up our mess.