I thought that all decisions were made on the pitwall and that he just drives and does as he is told. At least that was his claim during crashgate when asked whether he queried the odd strategy.
I'm sure he queried in Singapore 08 as he did in Abu Dhabi 10, if we were to believe the source. And like Abu Dhabi, even though he thought it was a mistake, he went with his strategists' call.
But I guess it's easier to believe that he was somehow involved in Crashgate or better yet, masterminded it if you dislike him. Even though evidence have so far shown that he knows nothing of the plot.