True, although they do seem to actually have the world's oldest continuous democracy, from what I've read. Could give some credence to their other claim.
Ethnologue mentions this fact too, in the comments, although they got the religion wrong, so take it with a grain of salt (they are not Hindu, but worship a god named Jamul, who's will is interpreted by an Oracle. But they are very adamantly not Hindu).
https://www.ethnologue.com/17/language/xns/
Ethnologue mentions this fact too, in the comments, although they got the religion wrong, so take it with a grain of salt (they are not Hindu, but worship a god named Jamul, who's will is interpreted by an Oracle. But they are very adamantly not Hindu). https://www.ethnologue.com/17/language/xns/