Personally I find that both sides have committed great evils in the past, but today more and more I tend to believe that Israel is in the wrong. A topic I could waffle on about for paragraphs, but I'll spare the thread an undignified death like most political ones.
Here's the journal of a group of humanitarian workers in Israel and their experiences, It might open your eyes some of the situation over there.
http://moomin13.livejournal.com/
My ‘polite’ opinion is that Israel has crossed too many lines here, and their attack has escalated way out of proportion. Not that they need to worry.
It's always makes my brain hurt to read that the US supported sanctions against North Korea after a failed missile test yet is against a ceasefire in this situation.