Actually, the question is whether the denialists have a leg to stand on
Monbiot appeared to show that they didn't as far as Bellamy is concerned. If you think there's a mistake in the proof Monbiot laid out, I'd be interested to hear it.
This is a shade of the one-denialist's-opinion-is-just-as-good-as-the-entire-scientific- establishment again, even where as here the denialist has egg all over his face.