Shri Saiyeen,
Hinduism by which I refer here to the brahminical scriptures, pay only lip service to Karma. The vedic brahmins indulged in unconscionable killing of animals in order to offer the "omentum" of those helpless animals in their sacrificial fire (which used to burn bright and tall, reaching the skies according to vedic imagination, and thus carry the offerings to their Gods directly). When Buddha came on the scene and opposed this pervasive cruelty in the name of religion and Ashoka became a very powerful monarch, the brahmins, like mice, virtually abandoned the vedic sacrifices. Does this not reveal that whatever the vedic brahmins were doing in the name of their gods, was only for their enjoyment and nothing else? If those brahmins
really believed (whether rightly or wrongly) that their sacrifices were really satisfying to their gods, would they have been able to desert their old ship so soon, without even the faintest opposition? Buddha called their bluff, Ashoka announced punishment for cruelty to animals and these brahmins knew that their charades may land them in prison. And this also shows that they had no intrinsic faith in whatever they preached by way of vedas, brahmana texts and so on.
The destitute (in a manner of speaking, because their age-old trick of sacrifices and the devas etc., were no longer marketable) the brahmins started the Epics/Purana scheme. This was mostly a common barn for both the Jains and the brahmins and each group tried to excel the other and produce highly imaginative stories which would help them to re-establish their control over the ignorant populace. The old set of gods (devas) were forsaken and some like Indra were even rubbished and made worse so that the new generation gods like Rama, Krishna, Dutta, Subrahmanya etc., could be adopted and new and more acceptable methods devised to regain control over the gullible majority which comprised mostly of the Vaishya class since the Sudras had no access to any part of the brahminical religion, till "the Almighty God" as per Dr. Barani, decided to ditch the brahmans - when the aliens left the Rock Fort for ever and so the Sudras could gradually claim their right to participate and learn their religion.
Lately brahmins seem to be slowly and surreptitiously once again hitching on to the new generation Gods called Gurus, Acharyas, Swamis, Babas, Godmen/Godwomen, etc. But to me it appears as though these new generation gods are very smart and so may outwit the brahmins