Walls do work. The Iron Curtain did it’s job for over 50 years, the Chinese Wall is still here and the US is building it’s homeland protection wall against those nasty Mexicans.
But in the long run all walls will fail.
I perfectly understand Israel’s idea and desire for the wall. It certainly stopped many suicide bombers and land based attacks. But the Palestinians are now shelling or shooting low tech rockets into Israel. Walls don’t stop hate and innovation.
Maybe negotiations will some day?