GW is a side issue.
"Stuart Blackman is a science writer and co-editor of the Climate Resistance blog."
So, not a denier, just "challenging the consensus".
Kinda like an Inteligent Design fan saying "I'm not a creationist, I'm just challenging the consensus of evolution".(!!!) Attempts to pre-empt such an analogy in your article, does nothing to reduce its pertinance.
Besides; MMGW is small potatoes compared to the real issue; an energy gap between supply and demand as carbon fuel is depleted. I'll happily ignore MMGW, take it right out the equation, deny it completely, and can still built a highly cogent argument in favour of a number of policies on a long term, economic, social and indeed moral basis. If the greens are wrong, and lets hope they are; most "green" policies still provide better long term benefits; less dependence on fossil fuels, preserved biodiversity, sustainable food production, fewer wars over resources, and ultimately a better standard of living. Dependancy on foriegn oil and gas from volatile countries? Industrially pooping where we eat? Emptying the larder? It doesn’t take a scientist or an environmentalist to realise these are bad ideas, does it? Abandoning concensus is a patently stupid idea, getting major players on board at an early stage is key to approaching a major transitional event like peak oil. Failing to plan is planning to fail. Not wanting everyone to "revert to the stone age" is the whole point of getting behind alterative, efficient tech and making best use of current resource.
Even if the scientific consensus on GW was the exact opposite of present; why wouldn't we hedge our bets, given reduced carbon dependency and sets us in good stead for the transition? That finite resources are being depleted isn't an "if" argument like MMGW, it's undebatable. It's a "when" event and the global implications are clear. MMGW or not, the policy of “carry on regardless” will in the long run, mess us up in numerous other ways.
Personal consumption isn't an inalienable right which overrides all other concerns, and the liberty of businesses to turn profit doesn't override the wider societal interest. Heck, there's even folk who disingenuously deny and resist change as a terrible inconvienience, whilst secretly betting on dying before any of these problems materialise!