Airplanes damage the Ozone layer and help create global warming. Campers invade wildlife habitat and start forest fires. According to radical environmentalists, all of these activities are enemies of the Earth. Therefore, all must be stopped. No tourist is safe from eco-terrorists.
Environmental terrorists perpetrate their violence because they have an agenda.
They want an end to human development. Their violence is designed to run property owners and business out of rural areas - as step one to their radical plans. Any movement can achieve its goals if it is protected from opposition. So far, this one has been hidden for more than a decade. It hasn't been reported on.