Shrimad Devi Bhagwad Puran describes the characteristics of the Brahmins of Kalyug

Shrimad Devi Bhagwad in Sixth Skand, Page 414 published from Gitapress Gorakhpur 

says that those who were considered Raakshas (Demons) in earlier Yugas are considered Brahmins in the Kalyug (current age) because they are always eager to deceive everyone and perform and advocate false and pretentious worship (pakhand) to their followers which is not in accordance with the Vedas.