Is the pizza obsession related to this?
Mixtures of milk and meat (Hebrew: בשר בחלב, basar bechalav, literally "meat in milk") are forbidden according to Jewish law. This dietary law, basic to kashrut, is based on two verses in the Book of Exodus, which forbid "boiling a (goat) kid in its mother's milk"[1] and a third repetition of this prohibition in Deuteronomy.[2]
https://en.wikipedia.org/wiki/Milk_and_meat_in_Jewish_law#Three_distinct_laws