Thanks for the links. It is interesting how nobody noticed that the letter presents itself as a nasty letter against Stallman, but then asks to boycott a piece of the community and its software. Very tricky letter. Eeew.
By the way, since it is also about Stallman after all, I saw he did make a public appearance last month:
At 2:31:25 he complains that the kill switches of the Pinephone are too inaccessible…