From the letter:

In addition, Israel is in the process of building the Apartheid Wall through the West Bank, which, when completed, will expropriate 50% of Palestinian land in the West Bank, depriving farmers and families of their livelihoods and water supply, and making movement for Palestinians almost impossible.

Always with the apartheid bs. Security walls between warring neighborhoods were a big part of the success of the surge, it’s not advertised much but once the walls went up a lot of violence stopped.