Stallman is not the brightest. He could have easily suggested to call it "nux" written as "gnux". It has "GNU", it has the second syllable of "Linux", but most importantly, it brings it down to one syllable... and is cool.

Instead, he tried to butcher a cool name that "Linux" is by adding capitalized "GNU" and a freaking slash. Why would anyone do that when saying and writing "Linux" serves the same... and if you have to refer to the kernel, you can say "the Linux kernel" or just "Linux" when the context lets you.