I honestly don't understand what people have against Pineapple on Pizza, Pineapple is one of the best fruits in existence, why would you not want to put it on other food?

I can understand it just not being some people's thing, but why do people get all vehement over it? And why Pineapple specifically? There's plenty of much worse toppings, like anchovies… And mayonnaise… yes, I knew someone that did that.