I'm not sure the context of the Singer's remarks matters much -- they were clearly against the newly announced policy that the meeting itself was about. And as

I'm not sure the context of the Singer's remarks matters much -- they were clearly against the newly announced policy that the meeting itself was about. And as a senior employee and member of the company's leadership, it was more incumbent on him than on others to follow the policy, in order to set the tone and be a good example. (NB even David and Jason seem to have recognized this -- after the meeting, Singer was suspended; he's since resigned, but this is likely the only one of the several recent resignations that was not entirely of the employee's own volition.)