Unlike the purpose of terrorist groups, the IDF does not seek death of innocent lives. Sometimes they need motivation to speak. It is bad for all sides and it is not moral. But as long as there won't be peace around, there is NO other way. And the people who stand up and try to stop the peace process are the people who finally get caught for their activity.
Peace means a different way of thinking and living.
Those 18 year olds needs peace more than they need the Dome of the Rock or a palestinian flag above Hebron.