I have no issue with any country keeping territory they gained after being attacked by 4 or 5 nations...considering how the United States was formed I would find it hypocritical for anybody who enjoys the fruits of that process to tell another country that they are not allowed to do so. I would have no issue with a 2 state system with the borders being where they ended up after the Arab-Israeli War and would expect either side to be dealt with if they violated that.