Not entirely: https://m.thewire.in/article/history/sikh-history-bjp-distor-anti-muslim-hate/amp

Buddhism and Jainism are a considerably less population than Sikhism, Islam, and Hinduism.

All he wants is votes from the 2 communities that share some considerably similar aspects with Hinduism.

Mind you, most voters in his party (and within his party), the BJP, think that you being Hindu AND being able to speak Hindi means that you are a true Indian.

https://imgur.com/a/uEOa0rs

https://www.trtworld.com/magazine/most-indians-believe-only-a-hindu-can-be-an-indian-47967/amp

The same BJP that institutes Hindutva and helps/partners with the RSS https://en.m.wikipedia.org/wiki/Hindutva (terrorists) organization which is, pretty bad.

The BJP claims that Hindutva represents "cultural nationalism" and its conception of "Indian nationhood", but not a religious or theocratic concept.[115] It is "India's identity", according to the RSS Chief Mohan Bhagwat.[116]

Edit: if you downvote me, why? What I said is backed up by the sources that i have linked