Dr Siddiqui said Mr Hamza's views were utterly unrepresentative of any section of mainstream British Muslim opinion.
Monday's decision, which was signed by seven judges from different European nations, follows a ruling this spring in which the same court likewise said that Hamza and four other terror suspects could be extradited.
"There is a hate campaign which has taken place against me, " Mr Abu Hamza said.
Mr Abu Hamza said in a speech there were "six enemies of Islam", including Christians and Jews, the Old Bailey heard earlier.
Mr Abu Hamza said he was a religious preacher and that it was unfortunate his comments had been taken out of context.
Sabah Police Chief Hamza Taib said two police officers and 12 Filipino rebels had been killed at Lahad Datu.
Sabah police chief Hamza Taib said the additional troops would boost public confidence, and would work alongside local police, AFP news agency reports.
BBC: Malaysia boosts Sabah security after Lahad Datu clashes
Hamza Taib said the killings happened during a 30-minute shoot-out on Friday morning, when members of the clan opened fire as the security forces were tightening a security cordon around the village.
Lawrence Whitehouse, whose wife Margaret was killed when they were both taken hostage in Yemen in 1998 in a kidhapping organised by Hamza, said he always thought he "ought to be tried for the part in organising our kidnapping" as he believes there is "little doubt that he was a force" behind it.
BBC: News - Today - Frank Gardner: Queen 'was upset' Hamza could not be arrested
Syria TV also said al-Assad met with members of Hamza's family on Tuesday, and it showed men it identified as the boy's father and uncle, who said that al-Assad was very welcoming and understanding, and promised reform.
"I welcome the decision of the European Court of Human Rights to allow the extradition of Abu Hamza and other terror suspects, " May said.
He said Mr Starmer's decision "smacks of a determined effort to extradite both these men" and said their cases were worlds apart from that of convicted terrorist Abu Hamza al-Masri.
BBC: Babar Ahmad and Syed Ahsan private prosecution rejected
The arrested group, who said they were in Yemen as tourists, had been sent by Abu Hamza.
The Edenbridge society said it had considered depicting Savile, British chancellor George Osbourne or extradited Muslim cleric Abu Hamza.
The prosecution came amid a "relentless campaign of adverse media publicity condemning him as a preacher of hate and inciter of violence", said Mr Fitzgerald, some of it driven by the public battle led by the Home Secretary to strip Abu Hamza of his citizenship.
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