It doesn't take a genius to realize that Israel is not talking about hunting down the suicide bombers who carry out the attacks. They are reffering to the one's who -organize- them. Did you not realize this or was it just another attempt to poke fun at Israel's stupidity when you were the stupid one?
I know exactly what they mean when they say they are going to "find those who are responsible." The problem I have is this: A suicide bomber is either acting alone or he is supported by a larger terrorist network. A government can never admit that he is acting alone for the same reason that police officers can never be trained properly to deal with someone intent on murder/suicide -- there is simply no rational way to deal with him (what are you going to do -- threaten to shoot him?). No government will ever admit that it is powerless to stop anything, since people will naturally question the legitimacy of the government itself.
On the other hand, a government that promises to aggressively pursue a suicide bomber who is part of a larger network is actually raising a completely separate issue: If this guy is part of a larger network, then this netowrk was in place long before he blew himself up on that crowded street. What gives me any level of assurance that you (the government) will be more successful in shutting down this network now than you were in stopping the attack in the first place?