Buddha, founder of Buddhism, was a Nepalese prince not Indian. India was invaded multiple times by non-Indian peoples but the natives are basically the stock you see that got raped by the occasional non-pajeet who got a bit too horny and figured "any port in a storm" will do.
As for sacred Hindu texts, I heard a rather amusing conspiracy theory that they are actually a compilation of the collective history of ancient humans who lived millions of years ago that got distorted over the ages and eventually turned into a religion by retarded poos. There's like a gazillion of them, enough to fill a library and apparently what exists is merely a fraction of what was originally available anyway.
It would certainly explain why it reads like some DBZ shit, you'd probably get similar results having a caveman perusing historical records of WW2.