He is known for his initiative of digitizing the Saiva Agamas, mystical scriptures of the Hindu Saivite religion and the basis for Hindu temple liturgy, making them freely available in digital format and encouraging their study.
The temples towns of Mylapore, Triplicane, Thiruvottiyur, Saidapet and Thiruvanmiyur, which are now part of Chennai city, had been visited by the Saivite saints called Nayanmars.
According to a Saivite legend, after his re-conversion, he ordered a massacre of 8000 Jains in Samanatham.
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According to a Saivite legend, when the Jains in Samanatham refused to convert to Shaivism, the king ordered their killings with the consent of Sambandar.
Dasgupta's chief opus is the identification of Indian spiritual meditation forms and demonstration of their relationship to Tantric Buddhism, to Saivite, Sakta and Vaishnava religious philosophies, and to Bengali literature.
Thirukarugavur is believed to be the place when the Saivite saint Cuntarar was purified of the sin of killing Jains who lost in debate with him.
In this they are similar to Saiva Vellalars of India who also consider themselves the custodians of Saiva Adheenams and Saivite culture.