Yes, he's talking about a disagreement there with the open source movement. But the overall thrust of the article is that FS and OS are the same thing, overall,

Yes, he's talking about a disagreement there with the open source movement. But the overall thrust of the article is that FS and OS are the same thing, overall, but lead people to different conclusions. He explicitly addresses the misconception that people think that only copyleft is free: Another misunderstanding of “open source” is the idea that it means “not using the GNU GPL.” This tends to accompany another misunderstanding that “free software” means “GPL-covered software.” These are both mistaken, since the GNU GPL qualifies as an open source license and most of the open source licenses qualify as free software licenses. There are many free software licenses aside from the GNU GPL. And that's all I want to get across. rms isn't as loony as people who want to disagree with him make him out to be.