Meatatarian and non- meatatarianEnglish has a term Meatatarian, which is often used as meatarian, to denote people who eat meat. In the same context, Vegetarians are those who eat vegetables and opposite to it is Non vegetarian. It means non vegetarians are those who do not eat vegetables. In general, people who eat meat also eat vegetables, so, using the term non vegetarians seems not to be right. Vegetarians can be denoted as Non-meatatarian, because they don't include meat in their diet. Still, we are familiar with the term now, so, not necessary to change anything in representing them.
People can be denoted with right terms like Vegetarian and Meatatarian. If differentiation need to be done, then we need to be differentiate as Meatatarian and non- meatatarian.
PS: This post is about the usage of terms and nothing related to food habits of people. So, please avoid discussion on which food is good to eat.