That article is very annoying as it is anchoring into silly technicalities. Yes, modern pizza came from Napoli and Italy (as a unified country) didn't even exist back then. But it is a complete sillyness not saying modern pizza is not Italian.
"Let me repeat that: Pizza isn’t Italian.
Pizza is Neapolitan. It’s a distinct speciality of Naples, developed at at time when Italy didn’t even exist as a nation. Saying pizza is Italian is like saying haggis is British. It might be technically true, but not really. "
Even in Italy we say Italian pizza and Neapolitan pizza are distinct concepts. Sicilian pizza too, to be clear. Italian pizza definitely comes from the export of Neapolitan pizza. Oh wait, then there is Roman-style pizza! It's very nuanced.
