This is nothing more than a propaganda piece aimed at making ISIS look bad, when in fact, ISIS is just doing their part in helping to save the erf. Biologists from The Center For Biological Diversity recently discovered a minnow (the lesser Burqa-burqa Akbar), which is endangered due to the lower water levels in the Euphrates. Ted Turner wrote them a substantial sized grant to close the dam in an attempt to save the minnow. Michael Robinson, CBD biologist, praised the move by ISIS stating “Thanks to caring individuals such as Mr Turner, and the bold efforts by ISIS, there is now hope for the Burqa-burqa Akbar minnow, and because of the importance it plays in the health of the ecosystem here, future generations of Iraqis can now have hope that their desert region will always remain a stellar example of what can be achieved when progressives and Muslims work together.”
The symbolical meaning of the Euphrates has been touched upon before. In the great age-long struggle between the kingdoms of Christ and the world the Euphrates represents the great separating boundary between the two kingdoms, as the literal Euphrates formed the barrier between Israel and the hostile northern and eastern kingdoms... It is the great impediment to war. ......The “kings of the east” (or of the sun-rising) represent the forces of rude and open evil which have been long restrained.... As the four barbarian and tyrant kings (Genesis 14:1-24) from the East invaded the land of promise in Abraham’s days, so the leaders of open and violent hate of right, purity, and Christ, have the way of their advance prepared.
from Ellicot’s Commentary