[4] He received his early education at the Faizul Islam Madrasa in phulat, founded by Rashid Ahmad Gangohi, now known as Jamia Imam Wali Ullah.

[6][10][11] In November 2014, Siddiqui remarked that "Indian Prime Minister Narendra Modi, who had faced accusations related to the 2002 Gujarat riots, appeared to be a more mellowed and responsible figure.

"[12] In September 2021, the Uttar Pradesh Anti-Terrorism Squad (ATS) arrested Kaleem Siddiqui on charges of being involved in a large-scale religious conversion network.

The police claimed that this network was receiving funding from abroad, particularly from Gulf countries and the United Kingdom, and that approximately 500,000 people had already been converted to Islam under this scheme.

[28][29][30] On September 10, 2024, a special NIA court convicted 15/16 individuals, including him and Umar Gautam, for their involvement in a pan-India illegal religious conversion racket.

[31][32][33] Afterwards, on September 11, 2024, the NIA-Anti-Terrorist Squad (ATS) court in Lucknow, Uttar Pradesh, issued life sentences to 12 people, including Siddiqui and Gautam.