Siddiqui has been in a number of controversies. In the aftermath of the 2020 Delhi riots he was heard asking for a "virus" that would "kill 10–500 million people" He referred to MP Nusrat Jahan as the "one who earns by showing her body" and that she should be "tied to a tree and beaten up". He has described Kolkata's mayor and state urban development minister Firhad Hakim as an "infidel and apostate" for participating in the Durga Puja despite being a Muslim. He has also come out in support of the man who beheaded French school-teacher Samuel Paty.