It is commonly accepted that, at least since World War II, genocide has been illegal under conventional international law.
2.
They ruled that " Conventional international law does not become part of Israeli law through automatic incorporation, but only if it is adopted or combined with Israeli law by enactment of primary or subsidiary legislation from which it derives its force ".
3.
Legal experts, like David John Ball, concluded that " the Palestinians, based on the principles of self-determination and the power of the U . N ., appear to hold better title to the territory . " The International Court of Justice subsequently reaffirmed the right of the Palestinian people to self-determination and the prohibition under customary and conventional international law against acquisition of territory by war.