Many of the refugees were nobles of the Chetri warrior caste from Rajasthan; forging new feudal states in Nepal, they were responsible for reinforcing Hinduism at the expense of Buddhism.
The Chetri warrior caste from Rajasthan pushed Hinduism and not Buddhism.
There are a lot of plot twists in the show, most recently, it was about a young twenty something lady accused of killing her rich husband for his money.