Participating in the debate on 'Commitment to the Constitution' in Rajya Sabha, she expressed concern over the condition of Scheduled Castes, OBCs and minorities particularly Muslims.
Taking strong objection to Singh's 'dog' remarks after killing to two Dalit children in Haryana, Mayawati said the Minister should be dropped from the Council of Ministers and "sent to jail as such people deserve to be in jail and not in Parliament".
The BSP chief dared Modi to take action against his own ministerial and party colleagues, who she alleged are making "provocative" remarks.
At the same time, she significantly chose the occasion to announce her unequivocal support to the GST bill, which is stuck in Rajya Sabha.
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In an apparent dig at Prime Minister Narendra Modi for
inviting Congress President Sonia Gandhi and former Prime Minister Manmohan Singh over tea to discuss the GST issue, the BSP chief said, "you will not need to offer even a cup of tea or a glass of water (to me) for this", evoking laughter in the House.
Mayawati alleged that an atmosphere of "intolerance, anarchy and extremism" is growing but the government is not giving attention.
"People from BJP and affiliated Hindu organizations keep on making controversial indignified remarks. But Prime Minister Narendra Modi, who is the head of the government keeps silent," she said.
The former Uttar Pradesh Chief Minister also brought Congress under the ambit of her attack questioning all previous governments on their commitment to the welfare of the Dalits and rejected the pro-Ambedkar assertions of both BJP and Congress.
The BSP chief pushed for reservation for Dalits and tribals in promotions in the government and the private sector and favoured quota for economically-backward sections.
"Prime Minister Narendra Modi said a lot in his concluding remarks during the debate on Constitution (in Lok Sabha) on Friday. It would have been better if he had announced some decision to amend the Constitution for reservation to the weaker sections of the society in private sector and reservation for ST/SCs in promotion," she said.
Mayawati said people from SCs/STs and OBCs, who have converted due to various reasons, should also get the benefits of reservations. Besides the Constitution should be amended to provide reservation also to the financially backward sections, she said.
"I am warning if there is any such attempt from the government, I will take to streets against it and hold a massive agitation against it. I will not allow any such attempt to succeed," Mayawati said, alleging a "conspiracy" behind such remarks.
Targeting Modi, Mayawati said when the Prime Minister
goes abroad to Buddhist countries he praises teachings of Lord Buddha but when he comes to India, his party (and) people work totally opposite. "They don't work in line with teaching of Buddha," she said.
She also demanded inclusion of reservation in the 9th Schedule of the Constitution as also amending Constitution to give reservation to weaker sections of the upper castes.
Mayawati also told the NDA government that the followers of Ambedkar will not come to it by only erecting memorials.
She claimed that when she headed a BSP-BJP coalition government in Uttar Pradesh over a decade ago, BJP put pressure on her to pursue Hindutva agenda. She said she rather chose to resign and run the government on principle enshrined in Constitution.
Congress which came in to power in 2004, too kept the issue hanging and it was Supreme Court which gave justice, she said.
She also accused the Centre of "miusing" CBI to "implicate" her in NRHM scam as Assembly elections in Uttar Pradesh are nearing.