That would also have worked, except in Damore's case they did actually solicit feedback (his memo was written after some training event where they said employee

That would also have worked, except in Damore's case they did actually solicit feedback (his memo was written after some training event where they said employees could/should comment). That said there's a difference between "I am talking about opinions and views that are irrelevant or inappropriate for the workplace", which is a mistake that is perhaps easy to make and can be trained out of people, vs "I am literally calling my coworkers nazis and demanding they be fired for expressing their views", which is not exactly a mistake and I see no real reason to tolerate such behaviour in any company.