The better criticism is that the 'left' that actually gets elected has done ~fuck-all to solve the problem, on any of the axes they could push. Of course, actually doing anything would be political suicide, and then the denialist-right gets all the power, and will also continue to do nothing.
It's not a 'two sides equivalence' issue. Anti-nuke people aren't the ones in control of the equilibrium, the right is. If the anti-nuke movement disappeared tomorrow, we'd still be in essentially the same pickle we're in. If the denialist-right movement dissapeared tomorrow, we might have some hope of making progress.
Just because you found one village idiot, doesn't mean that you should point at him, and shout that the village isn't really any different from the insane asylum up the road. They are not the same.
We should be proposing solutions, not blaming one side.