If he's the representative of the Free Software Movement, is it unreasonable to have certain expectations of what this representative presents himself as?
If he was only representing himself, as if he was just a writer or a programmer, you'd be right.
His views on open source represent that of the Free Software Movement, I don't see anyone questioning the german football coach's abilities of football and managing the german team due to him eating a booger on live tv during a game.
Yet when it comes to Stallman, his detractors seem to focus on ridiculing his person rather than argue against what he is saying.
If I find anything disgusting, it's such cowardly behaviour.