Free (as in freedom) Software.
> Stallman and Gnu are extremists
The word you're looking for is "radicals"; "extremists" carries connotations with violence and illegal behavior, which is the exact opposite of what Stallman/FSF stand for.
Are these views radical? Yes. But are they wrong?
The way I see it, RMS has been writing about what's wrong with the software world for decades and predicting the consequences. The industry has been ignoring this for just as long, and then people keep complaining about consequences materializing as predicted. Makes you wonder whether it's RMS that's really radical, or whether our Overton window has shifted so much that doing the right thing fell off it?