Why do people hate pineapple on pizza?

Pineapple has grown to be a rather controversial pizza topping.  Those that love it may like it for the contrast of the sweet and juicy pineapple combined with the savory profile from a traditional tomato sauce based pizza.  As pineapple is commonly known to be from Hawaii, some pizzerias have named a pineapple and ham pizza as a "Hawaiian" pizza which some may favor as Hawaii is usually a popular vacation destination and considered an exotic option for something traditional like pizza. Others that take a more purist preference towards pizza toppings have criticized pineapple as an abomination.