"A plague o' both your houses!"
This quote comes from the Play Romeo and Juliet by William Shakespeare (Act III, scene I). There has been a long standing feud between the Montague and the Capulet families. Mercutio is of neither family (actually a kinsman to the Ruler of Verona), but is a friend of Romeo's (a Montague). Shortly after the secret marriage of Romeo and Juliet, Tybalt (a Capulet) encounters Romeo and some of his friends including Mercutio. Romeo will not fight him since he is now related to Tybalt by marriage, however not all of his friends are aware of this and Mercutio engages Tybalt in a duel, during which he is mortally wounded and utters the above phrase.
It hould be reasonably obvious why I went with this line for my last post. An outsider gets caught up in a longstanding feud and is killed. Does Israel have the right to exist? Certainly. Just as much right as an independent Palestinian state does.