Israel should consider a deep trench along the Gaza Border as a defensive measure. That, combined with technology, would b more effective.

This is the Israeli version of the carnival game "Wack a Mole".

newer underground imaging and computers will reveal tunnels better. if Hamas would spend resources from tunnels on Gaza economy they would serve their subjects better. one might sat it's a "Hitler' mentality that kills and destroys to an end that destroys the people who employ this action.