Food is such a big part of our identities--cultural, spiritual,ideological-- that it is not so surprising for people to be extra sensitive to differences in diets and that various groups tend to be as judgemental about the food choices of others as they are about all the big moral issues. That said, my husband,who tends to identify with certain conservative, fundamentalist groups (and, by that token, oppose most others) delights in eating my now famous non dairy, egg free pumpkin cheesecake, but refuses to touch the brownies I regretfully labeled as vegan
(even though you seriously cannot tell...). Tricky things, those labels...