From what I can tell, it's Stallman who lacks empathy here. If he had ever thought about the impact of his behavior on the people around him, maybe he wouldn't have driven them all away.
I have addressed this in another comment. Yes, one can certainly argue that RMS ought to have been cognizant of his social faults, and perhaps his moral failings as well. But there's at least a colorable argument to be made the other way, given how he was (to quote the article) coddled while at MIT. (Keep in mind that until very recently, MIT did not even have a policy on e.g. employee training wrt. sexually appropriate behavior in the workplace, if we are to believe activists' claims! There's plenty of institutional failure to go around in that place. So, no, I'm not going to blame the guy in the absence of deeper knowledge about the actual facts of the matter.)