It seems overly charitable to me to frame the dispute in those terms. You and I might differ as to the appropriate amount of vermouth in a martini or pineapple on a pizza and I won't worry much about it, within reason.
There's a limit though! I think up to about 10% pineapple by weight is reasonable for a Hawaiian, if you choose 0 or 20% then we'll have no issue. If you went to 30% I don't think I could stop myself writing a libellous remark on hn. Anything about 50% and I would be morally forced to denounce you to the proper authorities. About 80% is where the nightmares begin.