some people may not eat meat thus vegrtarianism best for every one at all times
That is true 
some af the religious people that originated from an ancient people may think eating meat is against their rules 
You are correct. They are also called vegans 
the foods like milk and dairy products are obtain by animals but some of the people may use these types of dairy products but their oppose to eat meats.
That is true
in india the foods are hevily influenced byt the religious, cultural people they may not alo\low their family members to eat such products like meat.
Really? Like Buddhist, Hindus and rdgabmomoh
christian traditions are also varing from country to country but they are not avoiding such foods like meat,milk and dairy products