We know that we are in deep trouble when the new generations start solving math formula or hypothesis democratically, by the numbers of 'likes' and 'thumbs up' that they receive.
Is a popular opinion true automatically just because is emotionally satisfying to us, and hence is popular? Not.
As long as he assumes the risk to be corrected and wrong, Stallman has the right to express an discomforting ugly hypothesis or a discordant opinion. And is just that, an opinion. I have no reason to thing that is a dishonest one, that there is malice, attempt to defamation, or that there is a hidden agenda subjacent about it