Shariar Kabir was one of the prominent activists of Swadhin Bangla Betar Kendra in Kolkata during Bangladesh Liberation War.

[8] He helped to write inspiring script & poems for freedom fighter during the war which were played in Swadhin Bangla Betar Kendra.

[12] He was one of the main editors of Weekly Bichitra, which played a vital role for the punishment of liberation war criminals.

This committee called for the trial of people who committed crimes against humanity in the 1971 Bangladesh Liberation War in collaboration with the Pakistan Army.

The Ghatak-Dalal Nirmul Committee set up mock trials in Dhaka in March 1992 known as Gono Adalot (Court of the people) and 'sentenced' persons they accused of being war criminals.

[14][15] This charge was, however, dropped in 1996 after her death by the Chief advisor Mohammed Habibur Rahman of the Caretaker government of that time.

[17] The people's court set up by the Ekattorer Ghatak-Dalal Nirmul Committee led by Jahanara Imam was deemed unlawful by the Government of Bangladesh.

[20] Observers said that the BNP was threatened as its principal political partner, Bangladesh Jamaat-e-Islami has leaders who have been alleged to have participated as in paramilitary forces against liberation in 1971, which the party opposed.

[20] When the High Court ruled on 4 January 2003 that Kabir's detention without charges was illegal,[21] the government held him for an additional 90 days under the Armed Forces (Special Powers) Act.

[32] In October 2008, he called on the government to reinstall sculptures removed from the front of the Zia International Airport following demands by Islamists.

[33] In 2010, the High Court Division started hearing on a petition filed by him and Muntasir Mamun challenging the legality of their detention in 2002.

The first trials were completed in early 2013, with three men convicted who have been prominent in Jamaat since the liberation war, which the party opposed.

[48][49] Kabir was critical of the Awami League government for trying to prevent observation of the International Day of the World's Indigenous Peoples.

He wrote books including Nuliachorir Shonar Pahar, Abuder Adventure, Carpathian er Kalo Golap etc.

[61] He was placed in remand in the death of two protestors, who died in protests against former Prime Minister Sheikh Hasina, along with journalists Shyamal Dutta and Mozammel Babu.

[66] Shahrier Kabir, the prominent Bangladeshi activist and writer, has been a subject of controversy due to various perspectives on his actions and beliefs.

His account of the War of Liberation has been criticized by some as fabricated, with allegations that he uses this narrative to gain favor with the autocratic Hasina regime.

These controversies, published by Daily Inqilab, have contributed to varying interpretations of Kabir's role and legacy within the context of Bangladesh's socio-political landscape.