You trotted out his point of view: "One should not use proprietary software! It's evil, according to Stallman.", sounding like it is because of his moral judgement that you do not support him.
I think, all ideas should be given due consideration. Those that turn out to be wrong should be dismissed. The idea of the Free Software movement appears to be a wrong idea, and should be dismissed. The idea of the Open Source movement ('Some software should be free'), though, seems to be a right idea.
