2. According to Kriegman's letter to TR management, the internal social media post was reviewed by HR and the head of DEI and approved by the internal moderators. He followed it up with an email complaining about his harassment. It was only after the email that he was fired.
You either have no idea what happened in this story (and support the company anyway) or you're supporting a company for firing someone for emailing a harassment complaint.
As to 2, from his own post:
I was told I was not allowed to use any company communications channels (email, teams, the Hub, etc.) to discuss the attacks I had experienced. Receiving no support from HR, I [did precisely that] and was fired.
There is no evidence that TR did this, but if they did, it would be an egregious violation of civil rights law.
It's astounding to me how you can support this and not be utterly ashamed of yourself.
As to 2. -- it wasn't about "speaking up" (privately or verbally) but rather using company networks to do so (that is, spamming company boards with this nonsense). Which is a rather different matter.