There is a credible theory that one of the root causes of sinas chinam between the Litvish and Sephardeshe tziburs are their respective food and culinary preferences and minhagim. Even within an individual Litvish family, any questioning of their culinary mesorah (“….so you don’t eat XX on yom Tov YY) is likely to trigger as much broigas as announcing your future son-in-law is a Chabadnik. Foods and food preferences strangely are a very powerful force in interpersonal relationships….much more so than we acknowledge
