RMS is a "maniac", and I don't mean that in any derogative sense, but I can't find a better word. He is able to put forward enormous amounts of passion and energy for his cause.

Sometimes there are people who commit to ideas in such a way. Think of Gandhi and his absolute commitment to non-violence in any situation.

It's good that these people do what they do, but it's also important that they are taken with a grain of salt.