Their family presiding deity was “Sri Parvata Swamy”.
By their names we can know that they patronized vedic religion.
They were the 1st to build Hindu cave temples in south india.
Ikshvakus were 1st to build Hindu temples.
The Uma Maheshwaram temple (at Amrabad) in Sri Parvatham was known as the Northern Gateway for Srisailam.
Being followers of Vedic religion also, they did not hate other religions.
Jainism:
During Vishnukundins period, Srisailam was a great Jain centre, later it became a great Shaiva center.
This was mentioned in “Dharma Amrutham” written by Jain poet Nyaya Sena.
Jainism was degraded due to the “kapalika” sect of Jainism.
Buddhism:
The Prominent Buddhist Guru during Vishnukundins was Dignaga. His famous Sanskrit literary work was “Pramana Samuccaya”.
Dignaga taught “Yogacara” methods.
Dignaga was the last Buddhist Guru in Telugu
He debated with “Eshwar Krishna”, a poet of Vengi.
Duggipalli Duggena of Vishnukundins period wrote “Nachiketa Pakyanam”.
Great Buddhist place during Vishnukundins was “Bojjana Konda”.
Proceedings Known as “Divya’s”.
Madhav Varma had punished his son with the death sentence as he drowned the cart and crushed a son of a Tamarind merchant to death.
Symbolic stupa during their period was “Lingala Mettu”.
Vishnukundins were the last rulers, who patronized Buddhism.
During the 5th century A.D, a new Buddhist sect “Vajrayana” entered Amaravati and NagarjunaKonda.
Buddhism lost its sanctity because the “Vajrayana” sect allowed women,alcohol and encouraged black magic.
The Vajrayana sect was finally destroyed and lost people’s faith.
Later, the Brahmins changed the minds of people by saying that “Buddha” was the 9th incarnation of Vishnu and changed all the Buddhist centers into Vaishnava temples / centers.