The International Court of Justice, principal judicial organ of the UN, asserted, in its 2004 advisory opinion on the legality of the construction of the Israeli West Bank barrier, that the lands captured by Israel in the Six-Day War, including East Jerusalem, are occupied territory. Most negotiations relating to the territories have been on the basis of UN Security Council Resolution 242, which emphasises "the inadmissibility of the acquisition of territory by war", and calls on Israel to withdraw from occupied territories in return for normalization of relations with Arab states, a principle known as "Land for peace". According to some observers, Israel has engaged in systematic and widespread violations of human rights in the occupied territories, including the occupation itself and war crimes against civilians. The allegations include violations of international humanitarian law by the UN Human Rights Council, with local residents having "limited ability to hold governing authorities accountable for such abuses" by the U.S. State Department, mass arbitrary arrests, torture, unlawful killings, systemic abuses and impunity by Amnesty International and others and a denial of the right to Palestinian self-determination. In response to such allegations, Prime Minister Netanyahu has defended the country's security forces for protecting the innocent from terrorists and expressed contempt for what he describes as a lack of concern about the human rights violations committed by "criminal killers". Some observers, such as Israeli officials, scholars, United States Ambassador to the UN Nikki Haley and UN secretary-generals Ban Ki-moon and Kofi Annan, also assert that the UN is disproportionately concerned with Israeli misconduct.