India's national identity is drawn from its culture and symbols of nationhood cannot be completely devoid of cultural overtones.
Quoting from a recent article by Sudheerendra Kulkarni in I.E.; "As for the Leftists’ claim that the “the national ethos” of post-1947 India should be “only civic and territorial in nature”, and that it must have no cultural underpinnings and overtones — because that would make cultural nationalism as the basis of India’s nationhood — its sheer inanity is mind-boggling. By this logic, our Motherland would be reduced to a mere civic entity, cleansed of all its rich cultural-spiritual ecology, and the Republic of India, with its proud legacy of a living civilization that is over 5,000 years old, will have to be replaced by the Municipal Corporation of India."
In the following articles he also with rational arguments explains why singing Vande Mataram shouldn't be a problem to anyone by giving an analogy of Naguib Mahfouz in Egypt, and citing Nehru. There is no need for a disclaimer, if u read the linking articles.
I hope the readers are mature enough to not misinterpret the context.
Part 1. Part 2.