“Despite this severity however, the arguments have been laid out that this case is different because it is a Minhag Yisrael”
You’re the only one arguing that. You’re writing proofs which rely on an axiom not accepted as truth by anyone else, so no matter how hard you argue, it’s a waste of time. Nobody here believes a pop song that came out recently is a “minhag yisrael.” I don’t even think you truly believe that. It’s such an absurd argument that I have to conclude you’re either trolling or so obsessed with this song that you have it on repeat 8 hours a day and it’s started to adversely affect your logical reasoning/sanity.
Even if we were talking about a 100% uncontroversial, super frum, super Jewy pop song that definitely wasn’t A”Z, it would still be ridiculous to call it a “minhag yisrael.” You’re grasping for the weirdest of straws.