NO, try to ask for it in Italy. Good luck
Firstly, I'm not sure how this is really relevant given it has been a whopping 130 long years since the pizza was first "officially" invented in Napoli, time moves on. Perhaps the inventor of the pizza would have loved a bit of pineapple on there if they'd had some pineapples lying around! And as I already mentioned earlier in the thread, whilst pineapple on pizza is near impossible to find there in Southern Italy, it's everywhere these days in Northern Italy.
Secondly, what is impossible to find in Italy though is the likes of (also American influenced) stuffed crusts and deep pans but I don't see anyone here complaining about those on the basis of Italian pizza nationalism.
Really, pizzas are just fucking dough with shit on them. Like sandwiches, pasties, pies, enjoy whatever the hell you like on them and no need to be so needlessly pretentious. Enjoy your Texan BBQ pizza, enjoy your chicken tikka pizza, enjoy your chocolate and marshmallow pizza, or your classic margherita. Expand your horizons :)