Has there ever been , in real history and not mere mythology, a "Vedic Theocratic" Indian kingdom, where casteist laws, Manu's Law were the official rule of law? Where all education was religious\theocratic (Vedic), punishments like scalding a brahmin to death in burning wine for drinking wine, or pouring hot lead on a shudra for listening to Vedas, were actually enacted?
did such a thing ever exist?

>punishments like scalding a brahmin to death in burning wine
This is some bullshit. Don't believe every stinking shit you find on the web.