Because Israel siphoned off Jordan waters including Hasbani and Liddan and Golan tributaries and reduced river Jordan South of Tiberias to a salty sewage channel. This reduced Dead Sea water level from. -392 m to -415 m and its area from 1020 km2 to 630 km2. This is the first major change in 2000 years as recorded. As a result Palestine (West Bank) and Jordan are starved of water. Two thirds of Israel water consumption is stolen from Arab sources. This project will NOT bring water to the region. It will alleviate the sinking of the Dead Sea.
2 Yemeni Red Cross workers killed by gunmen (AP)
from the article: Is the Red Sea-Dead Sea canal about to become reality?