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).
I agree with copyleft and the fsf’s core ideas, but also understand some people just don’t like gnu, due to just not wanting to call it “gnu/linux” and stallman being kind of weird