Tu.114,
You hit on one of the problems the West face in understanding and dealing with Islamic fundamentalists. Islam does not have an organised structure or unified leader in the way that, say, the Roman Catholic Church has the Pope and it's structure, or the CofE the Archbishop, synods etc. So interpretation is down to the various Imans, scholars and tribal leaders. Each of whom has their own interpretation of what the Koran meant. So often, you listen to the leader that says what you want to hear.
It also leads to perceived insults to the religion being felt on a much more personal level, as there is no leadership body to react to insults.