To be fair, he may have motive for being "upset" since he was dismissed from being GNU Hurd's official maintainer by Stallman. From the Wikipedia link shared:

To be fair, he may have motive for being "upset" since he was dismissed from being GNU Hurd's official maintainer by Stallman. From the Wikipedia link shared: "Bushnell was Hurd's official maintainer from its instigation until November 2003, when he posted to the GNU project's discussion mailing list saying that he had been dismissed by Stallman for criticizing the GNU Free Documentation License.[5] Stallman said the dismissal was because Bushnell had been inactive since 2001 and wasn't responding to mail."