Blair stands by battle to beat fanatics.
The former Prime Minister defended the actions he took after 9/11 and said it was "deeply naive" to believe the West had radicalised extremist Muslims.
He said: "It is not because of something we are doing to them.
"They believe in what they believe in because they believe their religion compels them to believe in it."
Mr Blair warned: ''The way to defeat this ideology ultimately is by a better idea, and we have it, which is a way of life based on openness, democracy, freedom and the rule of law."