London suicide bomber Mohammad Sidique Khan condemned mainstream Muslim scholars in new extracts from a video broadcast on Tuesday night.
Most of the video was first shown in September
In it, he urged British Muslims to take part in jihad and condemned community leaders as "content with their Toyotas and their semi-detached houses".
The excerpt was broadcast in a report on Channel 4 News.
Another part of the video, already screened, showed him blaming the UK public for the 7 July Tube attacks.
Khan, from Dewsbury in West Yorkshire - the eldest of the four bombers - was responsible for the Edgware Road Circle Line explosion which killed six people and injured 120.
Most of the tape was aired in September, prompting outrage from victims' families and condemnation from the community where he lived.
In the latest quotes released, Khan said: "Jihad is an obligation on every single one of us, men and women, and by staying at home you are turning your backs on jihad which is a major sin.
"Our so-called scholars today are content with their Toyotas and their semi-detached houses.
"They tell us ludicrous things like `you must obey the law of the land'.
"How on earth did we conquer lands in the past if we were to obey by this law? By Allah, these scholars will be brought to account.
"If they fear the British Government more than they fear Allah then they must desist in giving talks, lectures and passing fatwas and they need to stay at home - they're useless - and leave the job to the real men, the true inheritors of the prophet."
The tape also contains a message from Ayman al-Zawahri, the deputy leader of the al-Qaeda network.
Of UK clerics, he said: "These are the scholars of beggary, working to beg the pleasure of Elizabeth, head of the Church of England."
He also called England one of Islam's "severest enemies".
On Channel 4 News, Muslim MP Shahid Malik rejected Khan's comments.
"The jihad he speaks about is the jihad of war and no cleric in this country would say for a second that this could be justified."
Labour peer Lord Ahmed added: "The jihad that you must do is become a good citizen and good member of the community.
"These people mis-interpret the Koran and take it out of context."