The Reading striker has taken the stance as he believe the anti-discrimination body has failed to taHowever, Ferguson believes Roberts is misguided.
"I have to disagree with Jason Roberts. I think he is making the wrong point," the Scot said.
"Everyone should be united, with all the players in the country wearing the Kick it Out warm-up tops."
Ferguson added: "I don't know what point he is trying to make.
"I don't know if he is trying to put himself on a different pedestal from everyone. But he really should be supporting all the rest of the players who are doing it."