Your list may differ from the list below.  And of course, some individuals of a particular culture may revel in any of the foods listed.  But as a general rule, the foods listed can offend those individuals for reasons of socialization, religious prohibitions, or habit.
 
 
Alcohol many religious groups, including Baptists, Muslims, Seventh Day Adventists, Mormons, Christian Scientists, and Jehovah's Witnesses
Beef Buddhists, Hindus, Chinese
Cheese many Koreans, Japanese, Chinese
Deep Fried Foods British and North American 
Upper Class
Lobster Muslims
Lamb Chinese
Meat Vegetarians
Pork Jews, Muslims
Seafood Jews
 

But, Northern Americans have their own food prohibitions which strike others as strange, including restrictions on consuming cattle organ meats (brains, eyes, intestines, kidneys), most insects, rodents, horses, etc.  In fact, you may be witnessing the evolution of a "food taboo" as fats, sugars, and salt, once valued staples of diets in the United States, become less popular with increasing interest in diet and health!