It is just nonsense to claim that construction of E1 "would preclude the establishment of a contiguous Palestinian state in the West Bank." Even if it was built, the Palestinian state would be considerably wider at that point than Israel is at its narrow waist between Herzlia and Qalqilya. Do you want to claim that Qalqilya prevents Israel being "a contiguous state"?
U.S., allies carry out 24 airstrikes on ISIS targets in Iraq, Syria (Reuters)
from the article: Israel's punishment