Explanation for newbies: The GNU/Linux copypasta is an argument made by Richard Stallman that the operating system should be referred to as “GNU/Linux” or “GNU+Linux” because linux is just the kernel and what makes it useful are the various GNU programs and libraries like coreutils and glibc.
Alpine Linux is a linux distribution that ships without any GNU software (though it can be installed using the package manager).
was Stallman really the author of that copypasta? I mean it’s funny to pretend he did, but does anyone know for sure?
No, it was a user on the FreeNode IRC in #Linux, not Stallman