He also posed a question to the ruling party, wondering what it would say about Sri Sri Ravi Shankar sharing the stage with Zakir.
"I am being criticised for sharing stage with Zakir Naik but what about Rajnath Singh ji meeting bomb blast accused Pragya Thakur ?"
"Pragya is an accused in bomb blast. Is there a case against Zakir Naik as yet? What about Sri Sri Ravi Shankar ji sharing stage with Zakir ?", he said in a series of tweets.
The Congress leader has in the past too alleged that Rajnath Singh had met Pragya in jail when the BJP was in the opposition. Rajnath Singh, who is now the Union Home Mnister, had then denied meeting her.
Digvijaya Singh is being targeted by the BJP after surfacing of a 2012 video showing him praising Zakir, who has come under government scrutiny after reports emerged that terrorists involved in Dhaka attack were inspired by him.
The BJP said Zakir was a "threat" to national security as it was clear from his speeches that he "incited" people.
"Terrorism is enemy of humanity. Anybody who directly or indirectly abets it is guilty. People like him (Zakir) are a threat to our national security. Government agencies should decide on action against him under the existing legal system. It is clear that he incited people," party national secretary Shrikant Sharma said on Thursday.
Citing Digvijaya's comments, he said, "It is in Congress' character to politicise and glorify terrorism. Its leaders used terms like Hafiz saab and Osama ji for terrorists.
"They questioned the sacrifice of Inspector Mohan Chand Sharma in Batla House encounter and claimed their president Sonia Gandhi cried whole night over the killings (of terrorists) in the encounter."
Digvijaya has defended himself, saying if there was any evidence against the preacher, then the Indian and Bangladeshi governments should take action against him.
"I have appealed for communal harmony and opposed religious fundamentalism and terrorism by either Hindus or Muslims," the Congress leader had said.
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