Earlier quoted context omitted.
My impression has not been that the memo is when political discussions turned toxic, but merely the first time it very publicly breached the sacred wall of non-disclosure with the outside world. Prior to that, most everyone seemed content to be upset with each other internally.
And they never punished the woman who leaked that internal memo. I thought that memo was foolish and short-sighted. I don't agree with it. However, it would have been better solved by a manager first asking him "do you really think it's a good idea to post this at work?" and having him tone it down than trying to publicly shame him and get him fired. Google picked the wrong side on that. They should have made an exam…
Are you aware that Google solicited that feedback?