rms isn't a businessman or a politician, he's a "prophet". However secular his beliefs, he sacrifices for his convictions (not that he has a "side", this isn't a sport!). He's in the tradition of Jesus, Luther, Copernicus. Their ideas threatened the orthodoxies of their time; what kept the money-changers in the temple, the Church profiting from indulgences and remaining the scientific authority. It wasn't a pity that Jesus waged peace on war, that Luther called bullshit on indulgences, or that Copernicus proved Earth went around Sun. If they'd've chosen otherwise, in retrospect, what good would it have done?
If Jesus led a rebellion against Rome, or Copernicus didn't publish, or, I don't know, Luther embraced the printing press + surplus cloth to trail-blaze the romance novel...
Their common enemy was ignorance, and history's been shaped by those who didn't compromise on what they knew mattered. That doesn't mean we all have to! I'm no prophet. I write proprietary software. But when I run across one of these articles, I remember that most software works best as a public good, that I should release more code on GitHub, that I should keep moving on my back-burner OSS projects, etc. His views aren't convenient to many hackers, but I find his determination admirable.
While there is wisdom in advising one to be single minded in one's pursuits, there is also wisdom in being open to the possibility of being wrong in that single mindedness. I believe rms is right to pursue the principles behind the FSF - it has brought much good. However, I think he is wrong to believe that FSF applies to everything.
I'm also glad that his is not the only voice in the open source/free software community.