There is no country in the world with as much diversity as India.
His film reached a global platform so he would obviously pitch it as a TELUGU film from INDIAN film industry.
That is not divisiveness but acknowledgment of his origins which people otherwise would not CARE to remember or distinguish.
Telugu states had fought a long hard battle to make an identity away from being clubbed as " Madrasis". And when stage presents it's not too bad to remind world that there exists Telugu, an identity of it's own, among the huge spectrum of languages and dialects of a country like India.
It's not about superiority or inferiority, just an acknowledgement of existence. They all obviously proudly represent their country in the end.
11