I think his behaviour is already well described by Carl Jung. His world view is skewed by mythology (like movies and hero worship) instead of by rational thought.
I'm not saying that you imply his wasn't equally skewed. Just that when I read about Stallman or other people who rightly attract admiration this truism tends to be conspicuously absent. But the mythology is just as strong there too-- a rational person would not take years to find out from a specialist that their chronic hand pain was due to repetition caused by an unreasonable amount of typing[1].