I always loved hearing stories from kids that spoke Italian at home in NJ who then went to Italy to discover the 1850s era Sicilian they actually spoke was nothing like modern Italian.

My grandparents imigrated with all 12 of thier kids (my aunts and uncles), you got a problem -lots of hand motions- wid that? Eh? Eh?

But seriously who started all this topping gatekeeping, pizza has spread all over the world with variations evrywhere.