I don't know what commenter was writing about, but he often played the "RMS is an extremist," card and would position himself as the sane person. Some people didn't like that, even though RMS is an extremist. I think many people (including me) got the sense that he was being manipulative to gain power.
Other than that, every once in a while he makes an annoying jab at RMS, and in at least one case, I felt he was grossly misrepresenting something RMS had said in order to gain more support for his own agenda.
I will give other people a chance to respond first, and for you to practice your google-fu, before turning the firehose of historical facts on you. There is a lot of evidence out there.