I Hate Selfrage the most

[rasomaso]

well I actually thought he was in the state where he sympathised with the Na'vi but:

a) he did not believe any of the "voodoo stuff", which is not his fault - nor would Jake if he didn't get the training from Neytiri to be able to "see"

b) I imagine him being under constant pressure as the boss of whole operation, RDA wants to see some results too...

Also if you pay attention to his reactions, I thought half of the irony in the reaction to Grace's speech was because he had to 'keep his face' (or how you call it, I don't know exact phrase) before the collective and Quaritch. Can you imagine consequences for him if he just said "alright let's mine elsewhere"? No one on Earth and most of the RDA employees on Pandora wouldn't believe Grace either. There is a deleted scene where he wants to stop Quaritch from loading the shuttle with the bomb pallets, but Quaritch scares him off and takes over (as mentioned by Max). Even the look on his face when boarding the shuttle says "I didn't want it to end like this"