Saudi Arabia's foreign minister has complained that criticism in the US is harming Saudi efforts to fight terror.
The prince said if Saudis were responsible for Bin Laden, so was the US
Prince Saud al-Faisal blamed parts of the US media for demonising Saudi Arabia, citing several recent books which said it nurtured extremism.
He said the country's critics actually served al-Qaeda militants who wanted to overthrow the Saudi monarchy.
In a speech at New York's Foreign Policy Association, he said alienation and suspicion had to be reversed.
"It is ironic that those who most vociferously attack Saudi Arabia are unwittingly serving the purposes of al-Qaeda," Prince Saud said.
"The attacks lead to undermining a country that is probably most capable of not only waging the war against [al-Qaeda], but also in preventing them spreading their cultist ideology in the Islamic world."
He added that to overthrow the Saudi regime, al-Qaeda "had first to drive a wedge between Saudi Arabia and the United States... and what better tool to utilise than the spectacular criminal act of 11 September?"
And he recalled that the US supported foreign Islamic militants during the Afghan war against the Soviet Union in the 1980s, which made Washington as much to blame as Riyadh for the rise of Osama Bin Laden.
Some US congressmen have criticised the Saudis for not having done enough to fight terrorism and crack down on its financial backers.
"Nothing could be further from the truth," Prince Saud said.
"After last week's events in Riyadh, I don't think any reasonable person can cast doubts about our commitment to waging a relentless war on terrorism."
Several Saudi police officers have been killed in recent attacks
He was referring to a large car bomb targeting a police headquarters in the Saudi capital which killed five people and wounded 145 others.
Police also had several armed confrontations with al-Qaeda suspects in and around Riyadh in which at least seven militants and four officers were killed.
In the latest counter insurgency operation, security forces have surrounded at least four suspects who fled to a rugged, cave-riddled enclave north-west of the
capital, AFP reported.
On Monday, King Fahd ordered a 25% pay rise for police units involved in trying to combat terrorism.