Addressing a rally here, Modi said, "Efforts have been made to undermine the great traditional heritage of Bengal."
He said the normal life of citizens has got disrupted in Bengal today and "even puja is under threat".
While Modi did not specify the name of the 'puja', Durga puja is the biggest festival of the state.
Modi's statement came in the backdrop of last year's controversy over the Trinamool Congress government's restriction imposed on the immersion of Durga idols.
The TMC's "political syndicate" rules in the land of "Vande Mataram" and "Jana-Gana-Mana" and pursues appeasement and vote bank politics, the prime minister said in his address.