You guys have no idea what kind of a role the religous fundamentalism plays in the modern day Arab society, and I really don't expect you to understand living in a free society.
They're like states ruled by muslim versions of holier than thou sackdance clones but with also the executive power to back it up. And it's not to "spread the good world of Islam" or "keep the pure muslim way of life alive" or even "wage war on the infidel". It is simply trying to keep the power of the ruling class.
Furthermore the Arabian ruling class has found out that creating a common enemy, and acting like that enemy will try to kill every last one of them if they don't kill it first makes it very easy to suppress the dissent in the country - sort of like how 9/11 made passing the Patriot Act possible I guess. And as long as they keep the oil flowing the west doesn't give a s*it if a few thousand people just don't who want to be living in an oppresive state who has no respect for basic human rights are torchured and executed every year.
Does this give Israel the right to kill innocent civilians.
Do the Arabs make it intentionally harder for Israel to discern innocent civilians from legitimate military targets.
So its actually a lose-lose situation for Israel but it chooses the lesser of two evils - protecting its own innocent civilans at the cost of killing the other sides innocent civilans. It is unfortunate but keeping in mind that the palestinians are the ones who keep bringing the civilans into this conflict time and time again, ultimatly understandable.The Palestinian authority is at least as much if not more to blame for the civilan casualties as Israel.