Well no shit they can, unless you're denying the Muslims that right too, are you?
And if it's not part of your constitution, India is a much more regressive society than previously thought! Freedom is quite literally seen as one of the main aspects of a democracy!
It is you advocating for them to leave their country (India) and their homes, rather than giving them their most basic rights in their own country, which are given to other religious groups.
Also, denying a specific demographic basic rights, while allowing it for other demographics, is, by definition, discrimination. It's not about what I consider to be discrimination, it's what everyone with basic comprehension skills, and the definition, considers to be discrimination.
Maybe English is not your strong suit.