"Had you been in opposition how would you have reacted? Please tell us," the Rajya Sabha MP said.
Earlier this week, Sibal had urged the Supreme Court to act suo motu on the Lakhimpur Kheri violence.
He later thanked the Chief Justice of India after the Supreme Court took cognisance of the incident and had said courts in India are temples of justice that can restore the faith of the voiceless.
Four farmers were mowed down by an SUV in Lakhimpur Kheri when a group agitating against the Centre's three new farm laws was holding a demonstration against the visit of UP Deputy Chief Minister Keshav Prasad Maurya.
Two BJP workers and a driver were beaten to death allegedly by the angry protesters, while a local journalist was also killed in the violence.
The UP police on Thursday made the first arrests in the Lakhimpur Kheri violence taking into custody two people and also summoned Union minister Ajay Mishra's son Ashish Mishra, an accused, for questioning.