Our composite culture is our assets,it has no single source or owner.Even though there are tensions still we have enough in common to communicate with each other and take pride in it. It is shaping our religious,regional and ethnic consciousness. Common is our tolerance respect for other religion and culture.
We are at home with differences,each of us has Indian image in his or her own way.We are one and celebrate and share our happiness and sorrows together.
Saints and sensibility  is another factor which unites.  Ramayana and Mahabharata -the only two languages that are understood all over the country,the Puranic sense of unity that is present  among the people of India.
Ishwar Allah Tero Naam,this bhajan goes against the exclusivity beliefs of both Hinduism and Islam.
India's unique features are cricket,science,politics and films. Cinema related to culture at four levels,it reflected civilisation,it conversed with nation and nation state,it echoed civil society and it  resonated folk and mass culture.
Partition is still giving pain,if partition officially divided Hindu and Muslim into the dreariness of nation-states,films showed as a creative unity of Hindu and Muslim.Cultural  unity of India began with films as an aswer to the partition,films was realistic enough to add to the nostalgia of unity. Films captured the real we-ness of the democratic,socialist,modern nation. As our films are not only  a modernist appeal to libety,equality and fraternity but to its more collective variant  of unity,diversity and integrity not within a closed universe,but with a cosmopolitan vision of the world.