You are one of the very few people in southern region who believe in being an Indian rather than a South Indian. I do not know what is the sample size you are talking about who believe like you, but definitely my experience in south India says just opposite to what you think. Anyways I wish everybody in southern region think like you.
Do not get me wrong, I am not attacking you personally and I am not supporting people who have written the above messages. All I want to say is get your facts checked before you say something, because I have met people (not one or two, many of them) who are highly educated(in south) who say openly that they are proud to be south Indians, trust me I am not lying.