It's really a million dollar question in India, as diet being a very important part, which really identifies in communities, i.e. muslims are known for their non-veg rich diets, Bengalis for can eat anything, south-indians for food with curd.
But really it's very problematic for us to decide what should be our natural diet, although we prefer the diet what have been taught from our birth, but still people its now very trendy among people to choose their daily diet. It's really being amazing to know more muslim people preferring vegetarian and jains going for non-vegetarian stuff.
Although Naturalogist claims that human are vegetarian, with various logics.According to them, animal who drinks with help of tongue like lion, tigers are being made as a non vegetarian, but animal who drinks with help of lips like cow, goat are vegetarian similarly human too drinks from lips. Apart from that the langth of intestine of non-vegetarians are small, and of vegetarian are long so is of human, which is 25 fts long.
The most important logic I got was during the killing of animals in butcher houses, the animal are scared and as result of which a hormone called adrenaline is produced in their blood and gets absorbed with meat which we eat and as a result of which it gets enter I our bodies. In human adrenaline is basically responsible and produced when they are in tension or in fear or facing lack of confidence. Which gets added to them as a result of their food habits. The same adrenaline is helpful of lions to get their attacking mode but since we are social being so these characteristics may be dangerous to us. Along with them the scientific logic of leaving onions and garlic is not known.
Above the upper logic we cannot define that vegetarians are only suited for the society the most but it can be said that food decides the personality of the eater.Apart from that its said human should eat vegetarian not only due to some community or religious reason but proved scientifically.