Why is pineapple wrong on a pizza?

Italians dislike pineapple on pizza because it breaks core rules of Italian culinary tradition, which values ingredient simplicity, balance, and regional identity rather than sweet-and-savory fusions.

Key Reasons Behind the Aversion
Cultural Tradition and Identity: In Italy, food is deeply tied to culture, heritage, and what generations grew up eating. Altering traditional recipes is often viewed as a slight against cultural heritage.

Flavor and Texture Balance: Traditional Italian pizza relies on a delicate balance of acidity, saltiness, and fat (such as tomatoes, mozzarella, olive oil, and cured meats). High-moisture, high-sugar pineapple disrupts this harmony and can make the crust soggy.
Gatekeeping and Culinary Rules: Many view the combination—invented in Canada in 1962 rather than Italy—as a violation of how ingredients are supposed to be paired.
Opinions on the topic differ, with some traditionalists strongly opposed while others view the reaction as exaggerated.
An Italian chef sacked from a Brisbane restaurant had refused to put pineapple on a pizza because it was an "insult to his culture".

For many Italians, pineapple on pizza is practically a blasphemy against our culinary traditions.