Don't worry about what Italians think about how you eat pizza. Unless you are in Italy, however you are eating it is probably unappealing to most Italians no matter what you are putting on it, even in its base form with no modifications.
Not one single actual Italian gives a flying fuck how you eat anything, as long as you eat enough.
The only "Italians" who say this shit are people that claim to be Italian because their great great great great grandfather once got a hand job in a Fiat 500