Ahead of this Sunday’s first round of France’s high-stakes parliamentary election, the slogan La jeunesse emmerde le Front national has been making the rounds on social networks. Young people are uploading clips of themselves singing it on TikTok, leftist MEP Manon Aubry has led chants of it at rallies, and actor Marion Cotillard has worn a badge with the slogan. Where does it come from? François Guillemot: The line is from the song Porcherie that I recorded with my punk band, Bérurier Noir, in 1985. The year before the far-right Front National party, then fronted by the father of National...