What are the reasons being used by Nehru for keeping India secular?

Do you think these reasons were only ethical and sentimental? Or were there some prudential reasons as well?

Reasons for keeping India secular:

1. After the partition of India there was tragic transfer of people between the two nation, and not all the Muslims left India, there were some lived in minority. So to ensure them right to live with dignity without any discrimination on the basis of religion, Nehru proposed the idea of Secular India.

2. He believed that everyone irrespective of religion, must enjoy security and rights.

No, The reasons for secular India were neither ethical nor sentimental but prudential as India’s secularism cherished long term goals like equality, liberty and fraternity.