The peaceful protests started against the Citizenship Amendment Act in December last year turned violent in January underlining police failure in assessing the intensity of brewing animosity among the people. After BJP leader Kapil Mishra made controversial remarks on Feb 23, police failed to take action against him and his party didn't denounce his speech.

from Times of India https://timesofindia.indiatimes.com/city/delhi/delhi-riots-what-authorities-could-have-done-differently/articleshow/74328602.cms