there are several mistakes in your description of the problem
GNU is not asking to be credited without Linux, the opposite is what you're doing
insisting on crediting only Linux does not address the perceived problem any better than crediting only GNU would

the combination became a working operating system when Linux got combined with GNU. the author of Linux said so himself in early announcements.
what sort of reasoning leads you to argue for naming this combination after the late-comer over the heavy-lifter?
more importantly, why do you side with a project that does not even respect your freedom, and insist in pretending the project that cares about defending your freedom played a lesser role in this history? who are you trying to fool, and why?