I would say a desire to be at the forefront of technological advances is just as strong counterpoint: other nations are jumping on board with alternative energy and the US will be left behind. Additionally the societal trend is an appreciation of alternative energy, with major funding pushes in private and academic R&D in the last decade (solar and Tesla as examples).

The only advantage alternative energy has at this point is the CO2 factor. Pound for pound, fossil fuel is still cheaper, and the world is already built for running on it. Until AGW, there was no economic incentive for real development. It's not a matter of changing course yet again. Without AGW, there is no incentive to move away from fossil fuels. They've spent the last 40 years getting smokestack emissions under control, so even "regular old pollution" isn't a deal breaker . The problem is that smokestacks make very clean CO2 without the particulates and sulphur.

Boom. No AGW, and there's no incentive for alternative, nor is there an emissions dis-incentive for fossil.