Noting the "increasing incidents of outright discrimination against Christians", the Constitutional Conduct Group said the Union government is doing little to protect religious minorities.
They said that the project will "destroy one of the most pristine habitats in the country, one which is home to various rare and endemic species, as well as to an extremely vulnerable tribe, the Shompens of Great Nicobar".
"By her incendiary hate speech and her repeated acts of propagating hate, she has forfeited the ethical right to be a Member of Parliament," the Constitutional Conduct Group said in an open letter.