It has nothing to do with snobbery. It has everything to do with what Italians regard as a pizza - they don't have chicken tikka ones either.Bung whatever you like on a bread/dough base but please don't insult Italians by calling it pizza.
Spath...I'm half Italian, and I'm like my food. But pineapple is an abomination to me when it's on a pizza. You can call that "pizza style" if you wish. But not Pizza.