Mr Rizvi also said that the central government "was working for everyone" and did not indulge in discrimination based on religion.
"There is no turbulent political atmosphere prevailing. There is no atmosphere of fear prevailing in the country. But the letter he (the archbishop) has written certainly will lead to an atmosphere of fear," Mr Rizvi told news agency PTI.
"He should refrain from making such statements. Such letters vitiate the atmosphere in the country," the National Commission for Minorities chairperson added.
Mr Couto had written a letter to all parish priests and religious institutions in the Delhi archdiocese a few days before the May 12 Karnataka elections, calling for a "prayer campaign" ahead of the 2019 general elections.
The archbishop, who also asked Christians to fast every Friday "for the nation", yesterday clarified that his letter had nothing to do with the Narendra Modi government at the Centre.
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