This line seems really over the top. If you're the leader of your company - it's your JOB to write to the team, correct them where they're wrong and steer the conversation in a productive manner.
Not really a fan of this overall post (50% of Googler's still don't think he should have been fired). If you think he should have been fired - that's fine - but I think if you watch his interviews, he was earnestly looking for a discussion. Feel free to write a letter or explain in real terms why he was wrong if you feel like that - but all these pieces about "why we shouldn't even have to have the discussion" - are sort of missing the point he brought up - which was that he didn't feel they could even have a discussion on this topic.