Fair. Putting aside the word itself though, I don't think Stallman lacks empathy.
What he does lack, IMHO, is a huge amount of basic, day-to-day understanding of how the world works. Such as the power dynamics of teenagers in the modern world. Things he's completely incapable of understanding because he chooses to isolate himself and live in an absurdly eccentric way. For fucks sake, have you seen how he browses the internet? [1]
He chooses to live that way because, for him, every single issue seems to be a hill he's ready to die on. It was only a matter of time until the hill was bad enough for this to happen.
Still, I maintain he's not evil, neither by your definition nor mine.
[1] https://stallman.org/stallman-computing.html
