You sound angry. But I think you're right about hunting them down. That strategy has been called "targeted killings" and it has been remarkably effective against Hamas in the last two or three years. Got them to offer a truce! Which we all know is nothing but an opportunity to regroup, but that's for another post.
Having a policy of targeted killings against those who practice terrorism doesn't mean a fence isn't helpful too.
Angry? Well, yes, but more angry that too many in the West want to justify murder. I think Israel would target even more, but has her arm bent by the US and world community to show some restraint.