> Yet, we must also acknowledge that Stallman’s behavior over the years has undermined a core value of the GNU project: the empowerment of all computer users. GNU is not fulfilling its mission when the behavior of its leader alienates a large part of those we want to reach out to.
> We believe that Richard Stallman cannot represent all of GNU. We think it is now time for GNU maintainers to collectively decide about the organization of the project. The GNU Project we want to build is one that everyone can trust to defend their freedom.
These are not supporters and the page isn't made in support of RMS.
> Support free software.
> Don’t support Stallman.
https://twitter.com/mattl/status/1177355118829854720?s=20
In any case I think it’s clear the letter is against Stallman retaining the leadership role and therefore in a binary supporter/adversary framing, the signers should not be considered “supporters” of RMS.
The second half of that sentence pits you directly against RMS, who has made clear he does not intend to leave his position with GNU.
That'd classify as being against RMS. You can argue semantics all you want, but with someone else as I am not interested.