I think farby is coming beikvei the video from the BT Yeshiva in eretz yisroel which was making fun of people who go off, called “the aveirah song”. I think he also might be thinking about how try as a person might, they’re always a yid and will never really be cut off.
I don’t think it’s in good taste though, ואין רוח חכמים נוחה בה