An interesting choice of words, Flyingfox, because to many of us sitting on the fence in this debate " 'holy warriors' and 'snake-oil salesmen' are not so philosophically far apart", or far apart from AGW proponents.
Everything you accuse 'skeptics' of, is bountiful in the AGW arguments.
Prove, under scientific method as you have described, that the climate is warming. Then, describe your scientific proofs that human activity is THE CAUSE of said warming. Then, show why warming is bad, or at least WORSE than non-warming. THEN you will have credibility- the credibility you seem to think is lacking in any skeptical voice. If, however, you debunk statements such as Mr. Lawrence's above with straw-man argument and rhetoric, you don't speak with moral authority, you just sound like another cretinous zealot guilty of his own accusations- however well-intentioned.