You need proof to file a lawsuit. A lot of it, especially if you claim must prove a pattern of behavior that is pervasive. If he didn't specify it, you'd say "well, there are no evidence of any specific behavior, only nebulous allegations, and we all know Damore is a liar, so he probably invented all this to justify his poor performance and hate for women". People say it anyway, but now know it's not true, because there is evidence.

Also, there's a bit of difference between "Let's discuss whether diversity is done right in Google" and "I will keep hounding you until one of us fired. Fuck you" (real quote), "We are at a point where the dialogue we need to be having with these people is ‘if you keep talking about this shit, i will hurt you." (again real quote), "We should be willing to give a wink and a nod to other Silicon Valley employers over terminable offenses" (trying to make your opponents unemployable), “You’re being blacklisted by people at companies outside of Google,” and, of course, "How do you let people know you don’t take their ideas seriously? … No-platforming fascists does scale. So does punching one on camera." and "Get in touch with your friendly local antifa" - this one is especially juicy as a lot of people insanely called what Damore did "violence" but then turn around and literally endorse actual physical violence.