Is that why the terrorist networks are all but destroyed, Israel?
You kill individual rats, but new ones spring up from the rat warrens to take their place. Sounds like a very expensive and very ineffective operation, unless you just plain enjoy the blood-feud, which all sides in the Middle East conflict seem to do.
Yes, but....
The question is whether Israel is able to hit the right people (e.g., Arafat or his high-ups), and the answer is no -- the international fallout of killing them would be worse for Israel than the terrorism.
In the case of these probably small terrorist organizations, it's probably sufficient to get the brains and/or money men. Suicide bombers are easy to get. Planners are not.