I don't mean to take away from Linus' achievement, nor to sound like RMS, but every time people refer to "the Linux operating system" it's misappropriating credit. They usually mean GNU/Linux and the kernel is only one piece of that. EDIT: Disregard this comment, the article has been edited removing references to Linux as an operating system.
1. an inherent part of the Operating System.
2. the only way Linux can be used.
The first point is debatable. In academic circles (where Linus has spent a big part of his career), operating systems usually designate the kernel. In commercial products, the kernel by itself is not very useful, so you'd add a few userland utilities to your definition.
The second point is simply wrong. Busybox is a very widely used alternative to GNU, and Android, arguably the most successful mass consumption Linux system to date, has zero GNU tool.
As much as I appreciate GNU, the FSF and rms, this constant demand for credit is, too often, misplaced and above all, a bunch of misguided rhetoric.
Can't we simply be happy for an engineer who fully deserves the recognition he's getting?