In many respects the challenge of
Islamic terror is unique,
hence the difficulty western
intelligence services encountered
trying to predict and prevent
its onslaughts.
The enemy is not, of course,
a religion - most Muslims
deplore what has occurred.
Nor is it a single state,
though this form of terrorism
needs the support of states to
give it succour.
Perhaps the best parallel is
with early communism.
Islamic extremism today, like
bolshevism in the past, is an
armed doctrine.
It is an aggressive ideology
promoted by fanatical, well-armed
devotees. And, like communism,
it requires an all-embracing
long-term strategy to defeat it.
(ur en artikel i The Guardian)