Delhi Chief Minister Arvind Kejriwal on Wednesday condemned BJP leader Dayashankar Singh's abusive remark against Bahujan Samaj Party chief Mayawati and termed it "shameful".Kejriwal also said atrocities against Dalits across the nation have increased under the Modi government. "This (BJP leader's remark) is shameful. BJP's abuses and threats against women continue unabated both online and offline," Kejriwal tweeted.BJP's Uttar Pradesh unit Vice President Dayashankar Singh had allegedly made a derogatory remark against the BSP chief. Mayawati has demanded Singh's expulsion from the BJP.Kejriwal also slammed the Bharatiya Janata Party led-government at the Centre over recent atrocities against Dalits. "Atrocities against Dalits and minorities have increased sharply during BJP regime," Kejriwal said in another tweet.The Rajya Sabha on Wednesday faced numerous disruptions as opposition members demanded a debate on atrocities against Dalits in Gujarat's Una town, where protests have continued with one Dalit man killing himself. The Dalit was among the five persons from the community who tried to commit suicide in separate incidents in Gujarat to protest atrocities against the Dalits.