[GregH]

To paraphrase it further, a ideology that goes against established constitutional freedoms and norms.

[ARridgerunner]

A Nationalism based on a dominant culture of the nation is not bad but a nationalism based on a very narrow section of the dominant culture is not welcome.

The dominant culture of India is Hindu. You still haven't defined this "very narrow section" of Hinduism.

To paraphrase it further, a ideology that goes against established constitutional freedoms and norms.

What is this ideology? This "very narrow section" of Hinduism?

It doesn't exist.