"But RMS made the C toolchain work" you say. Great, and lots of electric engineers made my computer work, but their names aren't on the operating system, because that's a different level of work. Everything we've seen from GNU shows that RMS can make wonderful tools for his own use, but not a particularly coherent operating system for anyone else.
So he (and GNU) get credit for the C toolchain, and get credit for Emacs, and don't get credit for Linux. Until they build one that we would like to use. Then they can call it what they want.