Under international law Israel is within its rights to establish a maritime blockade of the Hamas-ruled Gaza Strip, and to arrest "peace activists" on board vessels attempting to run the blockade, since Hamas is a hostile entity engaged in illegal armed confiict against Israeli civilians. 
Jeff Halper (left) recently suggested that Israelis are contemplating a “final solution” in regards to the Palestinians at a recent Sabeel conference but other Jewish activists are questioning the organization’s rhetoric and agenda.
The letter points out that "If Rev. Dr. Ateek's [left] approach to peacemaking is 'theologically correct,' as he asserts, then we must be living in the Middle Ages." 
For about two decades, Sabeel, founded by Rev. Dr. Naim Ateek (left), has portrayed Jewish sovereignty, and not efforts to undermine it, as the cause of the Arab-Israeli conflict.