The resignation comes days after the Haryana unit of the party served a show cause notice to him seeking explanation over his controversial remarks.
In his resignation letter which he forwarded to state BJP chief Subhash Barala over WhatsApp, Amu stated that he was upset over Chief Minister Manohar Lal Khattar allegedly skipping a meeting with representatives of the Karni Sena yesterday.
Rajput groups have been protesting against the period drama "Padmavati" alleging that it distorts historical facts.
Amu stated in his resignation letter that he had worked with full dedication for the party over the past few years, but felt that "CM Khattar does not need dedicated workers and office bearers. Khattar is surrounded by a coterie which is taking him away from dedicated workers for the last three years."
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Amu, however, said that he will continue to work as an ordinary BJP worker.
"We will reward the ones beheading them with Rs 10 crore and also take care of their family needs...We know very well how to treat those who insult the Rajput community," Amu had reportedly said.
The Haryana BJP had immediately distanced itself from Amu's remarks, saying he had made them in his personal capacity.
A show cause notice had been served to him by the party recently and he had been asked to explain the remarks.
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