When you hound a group of people with their backs against the wall, human lives will start to mean less and less. No matter which people we're talking about. If they can't win with a conventional military, guerrilla/freedom fighter/terrorist tactics will be used. There's nothing strange about that. Especially when you combine it with a handy cause/ideology/religion.
What would your solution to the problem be then? Wiping all Palestinians off the face of the earth?
Also, Scourge, I'd like to see some proof that Palestinians have 'always' persecuted Jews and helped the Nazis during World War 2. Hell, I would even be interested in seeing proof of Palestinians treating the Jews worse than any European nation throughout the ages. Antisemitism isn't a 20th century term you know. (It's actually a 19th century term! Haha. Well, you know what I mean.)