There's nothing negative about his comment. First- he isn't directing that comment to protesters- it's solely his opinion. He isn't saying "Don't have any protests" but rather setting up a protest and having is not totally going to solve the issues at hand- it feels like many of the protesters think that holding the protest(s) will fix these issues. It's going to take a LOT more than just a protest walking down the street. It's a start though.
I'm not sure how people who 'aren't ADers' going to see his posts unless somebody (you?) directs them to the forum as guests. Doubt many will have an opinion one way or another or 'look down' on him or snub him- maybe they will but I doubt that will affect Foxrac very much. You're already doing that by looking down on those who aren't attending the protests or still have questions or want more information about the protests.
There are many deaf people on FB but AD forum is niche and I found many AD members are more civil than FB members, also it is easy job for moderators on AD forum as well with no favoritism.