They also called for conducting research on the murder of four national leaders inside jail on November 3 in 1975 and exposing its masterminds.
The recommendations came at the webinar, 'Bloody November: Some Historical Realities,' held on Friday night.
Dr Mostafa Jalal Mohiuddin, president of Bangladesh Medical Association (BMA), Syed Badrul Ahsan, writer and researcher, Maj Gen (retd) Syed Shafayet Islam, son of Syed Nazrul Islam, and journalist Jahidul Hasan Pintu attended the webinar conducted by journalist and former student leader Subhash Singha Roy, said a press release of Centre for Research and Information (CRI) on Saturday.
"The time between August 15 and November 7 is a bloody chapter in Bangladesh’s history. The conspirators of that episode are still alive. They masterminded everything. No matter how old those incidents were, they must be unmasked," said Syed Shafayet Islam.
"Have we taken lessons from the incident of that day in the context of today's reality? Have we truly realised that incident? Have we been able to carry that lesson forward to this generation? That's what we should ponder on," he added.
Having joined the armed forces in 1975, Syed Shafayet Islam eventually became a major general in the 90s and left no stone unturned to find the documents that might shed some light on the 1975 assassination. But, by the time, all documents had been made traceless.
"Four national leaders were killed as a sequel to the assassination of Bangabandhu. The assassins figured it out well that the four leaders who had struggled alongside Bangabandhu for the country would navigate Bangladesh towards its goal if they remained alive," said Dr Mostafa Jalal Mohiuddin.
Dr Mostafa Jalal Mohiuddin also called upon historians to carry the torch of the history of 1975 to the new generation.
"The fire of truth must rise from ashes. The true history must be unearthed. Amu Bhai, Selim Bhai, Tofail Bhai are writing. If we can add our observations to that, the young generation will get enough content," he added.
"What role Taheruddin Thakur and Mahbub Alam Chashi played must be analysed in addition to Khondaker Mostaq and Ziaur Rahman. Many of the masterminds of August 15 died on November 3 and 7. They must undergo posthumous trials. The armed forces personnel who were involved in that murder can never be spared. We must research them as well. They must be tried," said Syed Badrul Ahsan.
"We must declassify who planned to model Bangladesh on Pakistan," said Zayadul Ahsan Pintu.
In the beginning of the discussion, Pintu said, "Were the assassinations of Bangabandhu and that of four national leaders committed by merely 12 armed forces officers? Who were behind the scene?
"A justice commission should be formed after interviewing the witnesses to the people becoming victims of the mass executions during the tenure of Ziaur Rahman," he said.
Also read: “Bangladesh liberated for 2nd time through 1975 civil-military uprising”: Fakhrul