If you don't know Hindi, you cannot be a prime minister. There are certain skills that are required for certain work.Of course, the ET article claims that Hindi is India's "National Language" also, and we know that that's bull crap.
At any rate, what is the solution to this discriminating rule about which there's a doubt as to whether it's even written or unwritten? Is India really a democracy? Then why are the speakers of Hindi superior to others? Why is knowing Hindi - a relatively impoverished, unembellished and new conglomeration of a handful of North Indian tongues - called a skill necessary to become the prime minister of a country where most residents don't speak in that conglomeration of tongues?