It's funny, when it comes to pineapple on pizza it is either "yeah it's okay" or "OMFG PURGE THE HERETICS!!!".
People who like it just kinda low key like it (never met a die hard pineapple on pizza guy) but the people who don't like it FUCKING loathe the concept so much you'd swear you've just told them you rape their children at night when you mention it.