We can hope.
Sobering that the “dirt-poor” refugees and women and innocent children of Palestine have the resources to fund frogmen, tunnels, underwater depots and exits, and the techniques to use them against Israel.
On the other hand, making it always ever-harder to just walk across the street and kill innocent Jews wholesale means the retail price of terrorism also goes up.
Building the wall to stop illegal aliens will not stop all illegal aliens. But it will make it harder for all illegal aliens, and WILL STOP many illegal aliens who would otherwise walk across.