Israel cannot rely on a right of self‑defence or on a state of necessity in order to preclude the wrongfulness of the construction of the wall. The Court accordingly finds that the construction of the wall and its associated régime are contrary to international law.
International Court of Justice 
Why is it so that a structure proclaimed illegal (or in breach of international treaties) by the General Assembly, the Red Cross, Amnesty International, Human Rights Watch, and Israeli human rights groups continue construction for nearly a decade?
The “Israeli West Bank Barrier” (also known as the “security fence” by the Israelis, and the “segregation wall” by Arabs), has been in existence since the Oslo Accords in 1993. However, such barrier only transformed to be a threat to the very existence of Palestinians after the al-Aqsa Intifada in 2000.
According to the Israeli story, the logic behind the barrier is obvious: security. The wall is aimed at reducing “Palestinian violence” and protecting citizens of the Israeli states.
That’s all fine and dandy, until we get to one stipulation: the path and structure of the wall is simply irrelevant to security. Instead of having the wall be built on the 1949 Armistice Lines (more commonly known as the Green Line), you will find the wall divergent in multiple areas, continuously annexing land from the Palestinian West Bank, essentially rendering it Israeli de facto.