Even if I accept that these quotes are an accurate portrayal of events that happened, I'd expect you to have more damning evidence to support canceling someone that has been extremely important in this industry for over 50 years.
Meanwhile over at the open letter:
> We urge those in a position to do so to stop supporting the Free Software Foundation. Refuse to contribute to projects related to the FSF and RMS. Do not speak at or attend FSF events, or events that welcome RMS and his brand of intolerance.
Emphasis mine.
The whole text constitutes a textbook character assassination attempt. Consider the amount of support and credibility you want to give to these people, including the Twitter mob that has apparently gone crazy after these announcements.