There's one very important aspect which is not subject to interpretation, and that's the life and example of Mohammed himself.
He was a full-on terrorist. If you live by his historical example, you end up flying a jet into a building. It's very cut and dried, very black and white. All the philosopical gyrations aside, and 'religious wisdom and mysticism' contained in the Koran, his actual, historical life is a shining example of what we are seeing today.
What do you call those that practise the tenets of Islam, but do not follow the terrorists?