The website even goes on to state that Jesus might have been kidnapped, flown out of Britain, held hostage, and tortured by MI5.
The site called islam4uk.com is being run by 41-year-old Anjem Choudary, the former UK head of banned Islamist group al Muhajiroun, who once called for the Pope to be executed.
"Jesus would have supported the struggle of the indigenous people in Afghanistan and Iraq, as opposed to the capitalist driven US-led alliance," the Daily Star quoted the website as saying.
"As such, and being a Syrian or Palestinian refugee in the UK, he would also have been subjected to a loyalty and allegiance test to ensure he put Britain and its Prime Minister Brown before God. He would also have been, no doubt, interned under Britain's new terrorism laws.
"Or maybe he would have been kidnapped by MI5 or Special Branch to be flown on one of their notorious rendition flights, then held hostage and tortured like so many other Muslims in Guantanamo Bay," the site added.
Choudary has also urged that violent Sharia law be introduced on the streets of Birmingham.
Meanwhile, Bishop Joe Aldred, chairman of the city's Council Of Black Led Churches, has urged people to join hands and work together against extremism.
"We must never give in to political opportunism masquerading as religious truth," he said.