If the former, having the movement spearheaded by someone who has pretty controversial views on the latter isn't really doing the movement any good. If FSF clings stubbornly to a thought-leader who people can't take seriously, they're canceling themselves.
I've seen the accusation leveraged in this topic that this anonymous piece could be FUD by Microsoft or a similar big-name software giant. I'd actually suggest the opposite: if I wanted to throw sand in the gears of free software, keeping Stallman in the leadership chair so that his opponents can point to him and say "You really want to listen to the guy who wants to sleep with your teenage daughter?" is the way I'd discredit the movement.
Who are you talking about? This is completely misleading and not what Stallman was saying.
There are more charitable interpretations, but "Stallman wants to sleep with your teenage daughter" is the less-charitable one that political opponents can continue to levy against the entire movement because the FSF won't let him go.
Which is why we should support him even more: https://news.ycombinator.com/item?id=22299156