The Ripple Effect video is more convincing than the official statements.' Mr Naseem, a well-educated man, had made 2,000 copies of Ripple Effect for members of his mosque.
Research has revealed that even before the contentious video came out, one in four British Muslims thought the Government or the Secret Services were responsible for the 7/7 atrocities. At Friday prayers recently, Dr Naseem asked the congregation to raise their hands if they did not accept the government version of events.
Today almost four years on, the images of that dreadful morning are etched into our minds: the woman in the haunting white burns mask being helped to safety; the shell-shocked businessman in a suit with his hair and shirt matted with blood; the crippled No 30 bus with its roof blown off; the mangled wreckage of smouldering Tube trains.
The country's worst-ever terrorist atrocity during London's morning rush hour on July 7, 2005, shattered for ever the heady euphoria in which the capital was basking the morning after winning the bid for the 2012 Olympics.
They say it takes seven minutes to walk from the Thameslink line station to the main King's Cross station, where there is an entrance to the Tube network.
Police say the four men were seen on the main King's Cross concourse at 8.26am, although no CCTV footage has ever been made public. How had the men got there in three short minutes after getting off the Luton train at 8.23am?
And so the story of 7/7 that we have come to accept was pieced together: four British Muslims - Mohammad Sidique Khan, 30, Shehzad Tanweer, 22, Jermaine Lindsay, 19, and Hasib Hussain, 18 - blew themselves up using home-made explosives, killing 56 and injuring 700 on three Tube trains and a double-decker bus.
They had travelled on a mainline train from Luton into King's Cross Thameslink Station in London, each carrying a heavy rucksack of explosives.
And they are demanding a full public inquiry to answer key questions about what the Intelligence Services and the police did and did not know before the bombings.
Meanwhile, the Government's determined refusal to meet their demands is having a very dangerous side-effect - fuelling myriad conspiracy theories about 7/7.
Even some senior Islamists believe the events of 7/7 were fabricated.
As Dr Mohammad Naseem, the chairman of Birmingham's Central Mosque, says in the BBC2 documentary: 'We do not accept the government version of July 7, 2005.
And it is such inconsistencies that are fuelling the deepening concerns.