You are trapped in a cage of your own creation. Literally go to aldi/wherever and get a frozen plain cheese pizza, frozen pineapple chunks and pepperoni. It's very important that you get frozen not canned pineapple, and cheese pizza and pepperoni separately, not a frozen pepperoni pizza!
While you are preheating the oven to cook the pizza, put the frozen pineapple in a colander over something to catch the drips like a baking sheet. Also microwave the pepperoni in 30 sec bursts until it begins to crisp up (time varies depending on # of pepperoni).
Once the oven is heated, place pineapples on pizza and put it in the oven. After half the cooking time add the pepperoni quickly, then finish cooking.
It's important to use a thin frozen pizza like the really cheap aldi ones so it crisps up. In my experience anti-pineapple people are usually just used to eating thick, relatively wet midwestern pizza, in which case pineapple isn't good cause it's just soft on soft. It has to be sodt on crunchy. I usually make my own very thin crispy pizzas but the $2 aldi ones are fairly close.
When You Try, Then You Will Realize