Manjhi, who belongs to the community, said all 22 Dalit castes in the state should join hands if they wanted to benefit politically and accused his mentor-turned-adversary Kumar of dividing them by coining a separate mahadalit category for "political reasons".
Addressing a convention of his newly-launched Hindustani Awam Morcha (Secular), he dubbed the alliance between Kumar and his one-time arch-rival Lalu Prasad of RJD as an "unholy alliance" and said it must be rooted out.
"I urge the scheduled castes and scheduled tribes to come together. They are 16 per cent of the population. They must break the caste barrier and forge ahead together for political benefits.
"I came from a deprived community and poor family. Nitish Kumar made me chief minister thinking I would be a rubber stampt... When I began applying my mind, he forced me out. It was an insult," he said referring to his forced removal from the chief minister's chair.
Manjhi during his tenure brought Paswans under the mahadalit category as well.
