RMS basically thinks that because linux was built with a lot of gnu tools, he and the rest of gnu are being screwed over/ignored/lost if it's not called gnu/linux, to symbolize that it's a kernel and a bunch of (gnu) tools.
Horseshit. It's a GNU/Linux system because the userland base (including the C library) are GNU software. Regardless of what you feel like calling it, that's the definition.