You're right, I'm sorry. There have been other articles about Israel floating the idea of killing relatives of suicide bombers, but I shouldn't mix them up. My initial point remains, though, that going after non-combatants is a waste of action and political capital, at best.
And you can't seriously be suggesting that punishing civilians is going to punish Hamas and al-Qaeda. Do you really think they're going to care about what happens to these people?